BGP + Route map + Next Hop

BGP + Route map + Next Hop
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Subject Author Date
BGP + Route map + Next Hop David Sudjiman 01-17-2007
Posted by David Sudjiman on January 17, 2007, 3:03 am
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Hi,

I created these routers with below configuration

R1===================R2

R1 connected to R2 with DTE-DCE serial.

hostname R1
!
interface Loopback0
ip address 131.108.1.1 255.255.255.0
ip policy route-map FROM-131.108.1.1-TO-131.108.3.1
!
interface Loopback1
ip address 131.108.4.1 255.255.255.0
ip policy route-map FROM-131.108.4.1-TO-131.108.6.1
!
interface Serial0
ip address 131.108.2.1 255.255.255.252
no fair-queue
!
interface Serial1
ip address 131.108.5.1 255.255.255.252
clockrate 56000
!
router bgp 1
bgp log-neighbor-changes
network 131.108.1.0 mask 255.255.255.0
network 131.108.4.0 mask 255.255.255.0
neighbor 131.108.2.2 remote-as 2
neighbor 131.108.5.2 remote-as 2
!
access-list 100 permit icmp host 131.108.1.1 host 131.108.3.1
access-list 101 permit icmp host 131.108.4.1 host 131.108.6.1
route-map FROM-131.108.1.1-TO-131.108.3.1 permit 10
match ip address 100
set ip next-hop 131.108.2.2
!
route-map FROM-131.108.4.1-TO-131.108.6.1 permit 10
match ip address 101
set ip next-hop 131.108.5.2

=========================

hostname R2
!
interface Loopback0
ip address 131.108.3.1 255.255.255.0
!
interface Loopback1
ip address 131.108.6.1 255.255.255.0
!
interface Serial0
ip address 131.108.2.2 255.255.255.252
no fair-queue
clockrate 56000
!
interface Serial1
ip address 131.108.5.2 255.255.255.252
!
router bgp 2
bgp log-neighbor-changes
network 131.108.3.0 mask 255.255.255.0
network 131.108.6.0 mask 255.255.255.0
neighbor 131.108.2.1 remote-as 1
neighbor 131.108.5.1 remote-as 1

=============================

R1#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS
level-2
ia - IS-IS inter area, * - candidate default, U - per-user
static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

131.108.0.0/16 is variably subnetted, 6 subnets, 2 masks
B 131.108.6.0/24 [20/0] via 131.108.2.2, 00:28:55
C 131.108.5.0/30 is directly connected, Serial1
C 131.108.4.0/24 is directly connected, Loopback1
B 131.108.3.0/24 [20/0] via 131.108.2.2, 00:28:55
C 131.108.2.0/30 is directly connected, Serial0
C 131.108.1.0/24 is directly connected, Loopback0
R1#sh ip bgp
BGP table version is 5, local router ID is 131.108.4.1
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal
Origin codes: i - IGP, e - EGP, ? - incomplete

Network Next Hop Metric LocPrf Weight Path
*> 131.108.1.0/24 0.0.0.0 0 32768 i
* 131.108.3.0/24 131.108.5.2 0 0 2 i
*> 131.108.2.2 0 0 2 i
*> 131.108.4.0/24 0.0.0.0 0 32768 i
* 131.108.6.0/24 131.108.5.2 0 0 2 i
*> 131.108.2.2 0 0 2 i

========================================================

When I tried to ping from 131.108.4.1 to 131.108.6.1, the route-map
didn't pickup anything.

R1#debug ip policy
Policy routing debugging is on
R1#ping
Protocol [ip]:
Target IP address: 131.108.6.1
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 131.108.4.1
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 131.108.6.1, timeout is 2 seconds:
Packet sent with a source address of 131.108.4.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms
R1#u all
R1#debug ip packet
IP packet debugging is on
R1#ping
Protocol [ip]:
Target IP address: 131.108.6.1
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 131.108.4.1
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 131.108.6.1, timeout is 2 seconds:
Packet sent with a source address of 131.108.4.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 52/73/124 ms
R1#
00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
routed via RIB
00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
sending
00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
(Loopback1), routed via RIB
00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
routed via RIB
00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
sending
00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
(Loopback1), routed via RIB
00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
routed via RIB
00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
sending
00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
(Loopback1), routed via RIB
00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
routed via RIB
00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
sending
00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
(Loopback1), routed via RIB
00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
routed via RIB
00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
sending
00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
(Loopback1), routed via RIB
00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4

==================================

What I want were:

any ICMP from 131.108.1.1 to 131.108.3.1 will be delivered using route
131.108.1.1-131.108.2.1-131.108.2.2-131.108.3.1

any ICMP from 131.108.4.1 to 131.108.6.1 will be delivered using route
131.108.4.1-131.108.5.1-131.108.5.2-131.108.6.1

1. Where was the wrong part of configuration?
2. Why?
3. How can I fix it?

--
thx
David Sudjiman

http://www.davidsudjiman.info

Posted by Steve on January 17, 2007, 8:43 am
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David,

I didn't look over your config carefully, but I'm not sure that route
maps will work when applied to the loopback interface. I have always
applied them to the incoming physical interface.

Regards,
Steve
www.networking-forum.com


> Hi,
>
> I created these routers with below configuration
>
> R1===================R2
>
> R1 connected to R2 with DTE-DCE serial.
>
> hostname R1
> !
> interface Loopback0
> ip address 131.108.1.1 255.255.255.0
> ip policy route-map FROM-131.108.1.1-TO-131.108.3.1
> !
> interface Loopback1
> ip address 131.108.4.1 255.255.255.0
> ip policy route-map FROM-131.108.4.1-TO-131.108.6.1
> !
> interface Serial0
> ip address 131.108.2.1 255.255.255.252
> no fair-queue
> !
> interface Serial1
> ip address 131.108.5.1 255.255.255.252
> clockrate 56000
> !
> router bgp 1
> bgp log-neighbor-changes
> network 131.108.1.0 mask 255.255.255.0
> network 131.108.4.0 mask 255.255.255.0
> neighbor 131.108.2.2 remote-as 2
> neighbor 131.108.5.2 remote-as 2
> !
> access-list 100 permit icmp host 131.108.1.1 host 131.108.3.1
> access-list 101 permit icmp host 131.108.4.1 host 131.108.6.1
> route-map FROM-131.108.1.1-TO-131.108.3.1 permit 10
> match ip address 100
> set ip next-hop 131.108.2.2
> !
> route-map FROM-131.108.4.1-TO-131.108.6.1 permit 10
> match ip address 101
> set ip next-hop 131.108.5.2
>
> =========================
>
> hostname R2
> !
> interface Loopback0
> ip address 131.108.3.1 255.255.255.0
> !
> interface Loopback1
> ip address 131.108.6.1 255.255.255.0
> !
> interface Serial0
> ip address 131.108.2.2 255.255.255.252
> no fair-queue
> clockrate 56000
> !
> interface Serial1
> ip address 131.108.5.2 255.255.255.252
> !
> router bgp 2
> bgp log-neighbor-changes
> network 131.108.3.0 mask 255.255.255.0
> network 131.108.6.0 mask 255.255.255.0
> neighbor 131.108.2.1 remote-as 1
> neighbor 131.108.5.1 remote-as 1
>
> =============================
>
> R1#sh ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS
> level-2
> ia - IS-IS inter area, * - candidate default, U - per-user static
> route
> o - ODR, P - periodic downloaded static route
>
> Gateway of last resort is not set
>
> 131.108.0.0/16 is variably subnetted, 6 subnets, 2 masks
> B 131.108.6.0/24 [20/0] via 131.108.2.2, 00:28:55
> C 131.108.5.0/30 is directly connected, Serial1
> C 131.108.4.0/24 is directly connected, Loopback1
> B 131.108.3.0/24 [20/0] via 131.108.2.2, 00:28:55
> C 131.108.2.0/30 is directly connected, Serial0
> C 131.108.1.0/24 is directly connected, Loopback0
> R1#sh ip bgp
> BGP table version is 5, local router ID is 131.108.4.1
> Status codes: s suppressed, d damped, h history, * valid, > best, i -
> internal
> Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
> *> 131.108.1.0/24 0.0.0.0 0 32768 i
> * 131.108.3.0/24 131.108.5.2 0 0 2 i
> *> 131.108.2.2 0 0 2 i
> *> 131.108.4.0/24 0.0.0.0 0 32768 i
> * 131.108.6.0/24 131.108.5.2 0 0 2 i
> *> 131.108.2.2 0 0 2 i
>
> ========================================================
>
> When I tried to ping from 131.108.4.1 to 131.108.6.1, the route-map didn't
> pickup anything.
>
> R1#debug ip policy
> Policy routing debugging is on
> R1#ping
> Protocol [ip]:
> Target IP address: 131.108.6.1
> Repeat count [5]:
> Datagram size [100]:
> Timeout in seconds [2]:
> Extended commands [n]: y
> Source address or interface: 131.108.4.1
> Type of service [0]:
> Set DF bit in IP header? [no]:
> Validate reply data? [no]:
> Data pattern [0xABCD]:
> Loose, Strict, Record, Timestamp, Verbose[none]:
> Sweep range of sizes [n]:
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 131.108.6.1, timeout is 2 seconds:
> Packet sent with a source address of 131.108.4.1
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms
> R1#u all
> R1#debug ip packet
> IP packet debugging is on
> R1#ping
> Protocol [ip]:
> Target IP address: 131.108.6.1
> Repeat count [5]:
> Datagram size [100]:
> Timeout in seconds [2]:
> Extended commands [n]: y
> Source address or interface: 131.108.4.1
> Type of service [0]:
> Set DF bit in IP header? [no]:
> Validate reply data? [no]:
> Data pattern [0xABCD]:
> Loose, Strict, Record, Timestamp, Verbose[none]:
> Sweep range of sizes [n]:
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 131.108.6.1, timeout is 2 seconds:
> Packet sent with a source address of 131.108.4.1
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 52/73/124 ms
> R1#
> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
> routed via RIB
> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
> sending
> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
> (Loopback1), routed via RIB
> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
> routed via RIB
> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
> sending
> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
> (Loopback1), routed via RIB
> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
> routed via RIB
> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
> sending
> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
> (Loopback1), routed via RIB
> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
> routed via RIB
> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
> sending
> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
> (Loopback1), routed via RIB
> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
> routed via RIB
> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
> sending
> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
> (Loopback1), routed via RIB
> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>
> ==================================
>
> What I want were:
>
> any ICMP from 131.108.1.1 to 131.108.3.1 will be delivered using route
> 131.108.1.1-131.108.2.1-131.108.2.2-131.108.3.1
>
> any ICMP from 131.108.4.1 to 131.108.6.1 will be delivered using route
> 131.108.4.1-131.108.5.1-131.108.5.2-131.108.6.1
>
> 1. Where was the wrong part of configuration?
> 2. Why?
> 3. How can I fix it?
>
> --
> thx
> David Sudjiman
>
> http://www.davidsudjiman.info



Posted by Gabriele Beltrame on January 17, 2007, 10:07 am
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Hi,

I'm not sure either; if loopback traffic is considered "local" then you
could use "ip local policy route-map <map name>" to policy route locally
generated traffic.

Regards,
Gabriele

> David,
>
> I didn't look over your config carefully, but I'm not sure that route
> maps will work when applied to the loopback interface. I have always
> applied them to the incoming physical interface.
>
> Regards,
> Steve
> www.networking-forum.com
>
>
>> Hi,
>>
>> I created these routers with below configuration
>>
>> R1===================R2
>>
>> R1 connected to R2 with DTE-DCE serial.
>>
>> hostname R1
>> !
>> interface Loopback0
>> ip address 131.108.1.1 255.255.255.0
>> ip policy route-map FROM-131.108.1.1-TO-131.108.3.1
>> !
>> interface Loopback1
>> ip address 131.108.4.1 255.255.255.0
>> ip policy route-map FROM-131.108.4.1-TO-131.108.6.1
>> !
>> interface Serial0
>> ip address 131.108.2.1 255.255.255.252
>> no fair-queue
>> !
>> interface Serial1
>> ip address 131.108.5.1 255.255.255.252
>> clockrate 56000
>> !
>> router bgp 1
>> bgp log-neighbor-changes
>> network 131.108.1.0 mask 255.255.255.0
>> network 131.108.4.0 mask 255.255.255.0
>> neighbor 131.108.2.2 remote-as 2
>> neighbor 131.108.5.2 remote-as 2
>> !
>> access-list 100 permit icmp host 131.108.1.1 host 131.108.3.1
>> access-list 101 permit icmp host 131.108.4.1 host 131.108.6.1
>> route-map FROM-131.108.1.1-TO-131.108.3.1 permit 10
>> match ip address 100
>> set ip next-hop 131.108.2.2
>> !
>> route-map FROM-131.108.4.1-TO-131.108.6.1 permit 10
>> match ip address 101
>> set ip next-hop 131.108.5.2
>>
>> =========================
>>
>> hostname R2
>> !
>> interface Loopback0
>> ip address 131.108.3.1 255.255.255.0
>> !
>> interface Loopback1
>> ip address 131.108.6.1 255.255.255.0
>> !
>> interface Serial0
>> ip address 131.108.2.2 255.255.255.252
>> no fair-queue
>> clockrate 56000
>> !
>> interface Serial1
>> ip address 131.108.5.2 255.255.255.252
>> !
>> router bgp 2
>> bgp log-neighbor-changes
>> network 131.108.3.0 mask 255.255.255.0
>> network 131.108.6.0 mask 255.255.255.0
>> neighbor 131.108.2.1 remote-as 1
>> neighbor 131.108.5.1 remote-as 1
>>
>> =============================
>>
>> R1#sh ip route
>> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
>> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
>> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
>> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
>> i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS
>> level-2
>> ia - IS-IS inter area, * - candidate default, U - per-user static
>> route
>> o - ODR, P - periodic downloaded static route
>>
>> Gateway of last resort is not set
>>
>> 131.108.0.0/16 is variably subnetted, 6 subnets, 2 masks
>> B 131.108.6.0/24 [20/0] via 131.108.2.2, 00:28:55
>> C 131.108.5.0/30 is directly connected, Serial1
>> C 131.108.4.0/24 is directly connected, Loopback1
>> B 131.108.3.0/24 [20/0] via 131.108.2.2, 00:28:55
>> C 131.108.2.0/30 is directly connected, Serial0
>> C 131.108.1.0/24 is directly connected, Loopback0
>> R1#sh ip bgp
>> BGP table version is 5, local router ID is 131.108.4.1
>> Status codes: s suppressed, d damped, h history, * valid, > best, i -
>> internal
>> Origin codes: i - IGP, e - EGP, ? - incomplete
>>
>> Network Next Hop Metric LocPrf Weight Path
>> *> 131.108.1.0/24 0.0.0.0 0 32768 i
>> * 131.108.3.0/24 131.108.5.2 0 0 2 i
>> *> 131.108.2.2 0 0 2 i
>> *> 131.108.4.0/24 0.0.0.0 0 32768 i
>> * 131.108.6.0/24 131.108.5.2 0 0 2 i
>> *> 131.108.2.2 0 0 2 i
>>
>> ========================================================
>>
>> When I tried to ping from 131.108.4.1 to 131.108.6.1, the route-map
>> didn't pickup anything.
>>
>> R1#debug ip policy
>> Policy routing debugging is on
>> R1#ping
>> Protocol [ip]:
>> Target IP address: 131.108.6.1
>> Repeat count [5]:
>> Datagram size [100]:
>> Timeout in seconds [2]:
>> Extended commands [n]: y
>> Source address or interface: 131.108.4.1
>> Type of service [0]:
>> Set DF bit in IP header? [no]:
>> Validate reply data? [no]:
>> Data pattern [0xABCD]:
>> Loose, Strict, Record, Timestamp, Verbose[none]:
>> Sweep range of sizes [n]:
>> Type escape sequence to abort.
>> Sending 5, 100-byte ICMP Echos to 131.108.6.1, timeout is 2 seconds:
>> Packet sent with a source address of 131.108.4.1
>> !!!!!
>> Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms
>> R1#u all
>> R1#debug ip packet
>> IP packet debugging is on
>> R1#ping
>> Protocol [ip]:
>> Target IP address: 131.108.6.1
>> Repeat count [5]:
>> Datagram size [100]:
>> Timeout in seconds [2]:
>> Extended commands [n]: y
>> Source address or interface: 131.108.4.1
>> Type of service [0]:
>> Set DF bit in IP header? [no]:
>> Validate reply data? [no]:
>> Data pattern [0xABCD]:
>> Loose, Strict, Record, Timestamp, Verbose[none]:
>> Sweep range of sizes [n]:
>> Type escape sequence to abort.
>> Sending 5, 100-byte ICMP Echos to 131.108.6.1, timeout is 2 seconds:
>> Packet sent with a source address of 131.108.4.1
>> !!!!!
>> Success rate is 100 percent (5/5), round-trip min/avg/max = 52/73/124 ms
>> R1#
>> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
>> routed via RIB
>> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
>> sending
>> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
>> (Loopback1), routed via RIB
>> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
>> routed via RIB
>> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
>> sending
>> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
>> (Loopback1), routed via RIB
>> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
>> routed via RIB
>> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
>> sending
>> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
>> (Loopback1), routed via RIB
>> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
>> routed via RIB
>> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
>> sending
>> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
>> (Loopback1), routed via RIB
>> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
>> routed via RIB
>> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
>> sending
>> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
>> (Loopback1), routed via RIB
>> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>>
>> ==================================
>>
>> What I want were:
>>
>> any ICMP from 131.108.1.1 to 131.108.3.1 will be delivered using route
>> 131.108.1.1-131.108.2.1-131.108.2.2-131.108.3.1
>>
>> any ICMP from 131.108.4.1 to 131.108.6.1 will be delivered using route
>> 131.108.4.1-131.108.5.1-131.108.5.2-131.108.6.1
>>
>> 1. Where was the wrong part of configuration?
>> 2. Why?
>> 3. How can I fix it?
>>
>> --
>> thx
>> David Sudjiman
>>
>> http://www.davidsudjiman.info
>
>



Posted by John Agosta on January 17, 2007, 11:23 am
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> Hi,
>
> I'm not sure either; if loopback traffic is considered "local" then you
> could use "ip local policy route-map <map name>" to policy route locally
> generated traffic.
>
> Regards,
> Gabriele
>
>> David,
>>
>> I didn't look over your config carefully, but I'm not sure that route
>> maps will work when applied to the loopback interface. I have always
>> applied them to the incoming physical interface.
>>
>> Regards,
>> Steve
>> www.networking-forum.com
>>
>>
>>> Hi,
>>>
>>> I created these routers with below configuration
>>>
>>> R1===================R2
>>>
>>> R1 connected to R2 with DTE-DCE serial.
>>>
>>> hostname R1
>>> !
>>> interface Loopback0
>>> ip address 131.108.1.1 255.255.255.0
>>> ip policy route-map FROM-131.108.1.1-TO-131.108.3.1
>>> !
>>> interface Loopback1
>>> ip address 131.108.4.1 255.255.255.0
>>> ip policy route-map FROM-131.108.4.1-TO-131.108.6.1
>>> !
>>> interface Serial0
>>> ip address 131.108.2.1 255.255.255.252
>>> no fair-queue
>>> !
>>> interface Serial1
>>> ip address 131.108.5.1 255.255.255.252
>>> clockrate 56000
>>> !
>>> router bgp 1
>>> bgp log-neighbor-changes
>>> network 131.108.1.0 mask 255.255.255.0
>>> network 131.108.4.0 mask 255.255.255.0
>>> neighbor 131.108.2.2 remote-as 2
>>> neighbor 131.108.5.2 remote-as 2
>>> !
>>> access-list 100 permit icmp host 131.108.1.1 host 131.108.3.1
>>> access-list 101 permit icmp host 131.108.4.1 host 131.108.6.1
>>> route-map FROM-131.108.1.1-TO-131.108.3.1 permit 10
>>> match ip address 100
>>> set ip next-hop 131.108.2.2
>>> !
>>> route-map FROM-131.108.4.1-TO-131.108.6.1 permit 10
>>> match ip address 101
>>> set ip next-hop 131.108.5.2
>>>
>>> =========================
>>>
>>> hostname R2
>>> !
>>> interface Loopback0
>>> ip address 131.108.3.1 255.255.255.0
>>> !
>>> interface Loopback1
>>> ip address 131.108.6.1 255.255.255.0
>>> !
>>> interface Serial0
>>> ip address 131.108.2.2 255.255.255.252
>>> no fair-queue
>>> clockrate 56000
>>> !
>>> interface Serial1
>>> ip address 131.108.5.2 255.255.255.252
>>> !
>>> router bgp 2
>>> bgp log-neighbor-changes
>>> network 131.108.3.0 mask 255.255.255.0
>>> network 131.108.6.0 mask 255.255.255.0
>>> neighbor 131.108.2.1 remote-as 1
>>> neighbor 131.108.5.1 remote-as 1
>>>
>>> =============================
>>>
>>> R1#sh ip route
>>> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
>>> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
>>> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
>>> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
>>> i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS
>>> level-2
>>> ia - IS-IS inter area, * - candidate default, U - per-user static
>>> route
>>> o - ODR, P - periodic downloaded static route
>>>
>>> Gateway of last resort is not set
>>>
>>> 131.108.0.0/16 is variably subnetted, 6 subnets, 2 masks
>>> B 131.108.6.0/24 [20/0] via 131.108.2.2, 00:28:55
>>> C 131.108.5.0/30 is directly connected, Serial1
>>> C 131.108.4.0/24 is directly connected, Loopback1
>>> B 131.108.3.0/24 [20/0] via 131.108.2.2, 00:28:55
>>> C 131.108.2.0/30 is directly connected, Serial0
>>> C 131.108.1.0/24 is directly connected, Loopback0
>>> R1#sh ip bgp
>>> BGP table version is 5, local router ID is 131.108.4.1
>>> Status codes: s suppressed, d damped, h history, * valid, > best, i -
>>> internal
>>> Origin codes: i - IGP, e - EGP, ? - incomplete
>>>
>>> Network Next Hop Metric LocPrf Weight Path
>>> *> 131.108.1.0/24 0.0.0.0 0 32768 i
>>> * 131.108.3.0/24 131.108.5.2 0 0 2 i
>>> *> 131.108.2.2 0 0 2 i
>>> *> 131.108.4.0/24 0.0.0.0 0 32768 i
>>> * 131.108.6.0/24 131.108.5.2 0 0 2 i
>>> *> 131.108.2.2 0 0 2 i
>>>
>>> ========================================================
>>>
>>> When I tried to ping from 131.108.4.1 to 131.108.6.1, the route-map
>>> didn't pickup anything.
>>>
>>> R1#debug ip policy
>>> Policy routing debugging is on
>>> R1#ping
>>> Protocol [ip]:
>>> Target IP address: 131.108.6.1
>>> Repeat count [5]:
>>> Datagram size [100]:
>>> Timeout in seconds [2]:
>>> Extended commands [n]: y
>>> Source address or interface: 131.108.4.1
>>> Type of service [0]:
>>> Set DF bit in IP header? [no]:
>>> Validate reply data? [no]:
>>> Data pattern [0xABCD]:
>>> Loose, Strict, Record, Timestamp, Verbose[none]:
>>> Sweep range of sizes [n]:
>>> Type escape sequence to abort.
>>> Sending 5, 100-byte ICMP Echos to 131.108.6.1, timeout is 2 seconds:
>>> Packet sent with a source address of 131.108.4.1
>>> !!!!!
>>> Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/40 ms
>>> R1#u all
>>> R1#debug ip packet
>>> IP packet debugging is on
>>> R1#ping
>>> Protocol [ip]:
>>> Target IP address: 131.108.6.1
>>> Repeat count [5]:
>>> Datagram size [100]:
>>> Timeout in seconds [2]:
>>> Extended commands [n]: y
>>> Source address or interface: 131.108.4.1
>>> Type of service [0]:
>>> Set DF bit in IP header? [no]:
>>> Validate reply data? [no]:
>>> Data pattern [0xABCD]:
>>> Loose, Strict, Record, Timestamp, Verbose[none]:
>>> Sweep range of sizes [n]:
>>> Type escape sequence to abort.
>>> Sending 5, 100-byte ICMP Echos to 131.108.6.1, timeout is 2 seconds:
>>> Packet sent with a source address of 131.108.4.1
>>> !!!!!
>>> Success rate is 100 percent (5/5), round-trip min/avg/max = 52/73/124 ms
>>> R1#
>>> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
>>> routed via RIB
>>> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
>>> sending
>>> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
>>> (Loopback1), routed via RIB
>>> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>>> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
>>> routed via RIB
>>> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
>>> sending
>>> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
>>> (Loopback1), routed via RIB
>>> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>>> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
>>> routed via RIB
>>> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
>>> sending
>>> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
>>> (Loopback1), routed via RIB
>>> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>>> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
>>> routed via RIB
>>> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
>>> sending
>>> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
>>> (Loopback1), routed via RIB
>>> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>>> 00:40:46: IP: tableid=0, s=131.108.4.1 (local), d=131.108.6.1 (Serial0),
>>> routed via RIB
>>> 00:40:46: IP: s=131.108.4.1 (local), d=131.108.6.1 (Serial0), len 100,
>>> sending
>>> 00:40:46: IP: tableid=0, s=131.108.6.1 (Serial0), d=131.108.4.1
>>> (Loopback1), routed via RIB
>>> 00:40:46: IP: s=131.108.6.1 (Serial0), d=131.108.4.1, len 100, rcvd 4
>>>
>>> ==================================
>>>
>>> What I want were:
>>>
>>> any ICMP from 131.108.1.1 to 131.108.3.1 will be delivered using route
>>> 131.108.1.1-131.108.2.1-131.108.2.2-131.108.3.1
>>>
>>> any ICMP from 131.108.4.1 to 131.108.6.1 will be delivered using route
>>> 131.108.4.1-131.108.5.1-131.108.5.2-131.108.6.1
>>>
>>> 1. Where was the wrong part of configuration?
>>> 2. Why?
>>> 3. How can I fix it?
>>>
>>> --
>>> thx
>>> David Sudjiman
>>>
>>> http://www.davidsudjiman.info

Not sure if the above suggestion for "local" policy will do the trick, but
the following will:
Put a PC on the ethernet port of your router, and place the policy map on
the ethernet.
Ping from your PC.....



Posted by David Sudjiman on January 17, 2007, 3:27 pm
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David Sudjiman wrote:
> What I want were:
>
> any ICMP from 131.108.1.1 to 131.108.3.1 will be delivered using route
> 131.108.1.1-131.108.2.1-131.108.2.2-131.108.3.1
>
> any ICMP from 131.108.4.1 to 131.108.6.1 will be delivered using route
> 131.108.4.1-131.108.5.1-131.108.5.2-131.108.6.1
>
> 1. Where was the wrong part of configuration?
> 2. Why?
> 3. How can I fix it?
>

Thx to Steve, Gabriele, and John.

I thought that was the problem, couldn't be simpler :-)

Let me try that and let you guys know.

--
thx
David Sudjiman

http://www.davidsudjiman.info

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