0000.0000.0000 MAC Addresses in ARP Table.

0000.0000.0000 MAC Addresses in ARP Table.
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0000.0000.0000 MAC Addresses in ARP Table. ws00sw 06-06-2005
Posted by on June 6, 2005, 6:04 am
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Hello all
I have this Juniper ERX in my network
What i'm worry about are the 0000.0000.0000 MAC Addresses that are
present in the Arp Table

Does anyone know why?
Regards
ws00sw

plc-bras#show ver
Juniper Edge Routing Switch ERX-1400
Copyright (c) 1999-YYY5 Juniper Networks, Inc. All rights reserved.
System Release: erx_5-3-3p0-8.rel
Version: 5.3.3 patch-0.8 [BuildId 3397] (April 8, YYY5
09:11)
System running for: 0 days, 10 hours, 54 minutes, 9 seconds
(since FRI JUN 03 YYY5 00:24:30 GMT-4)

slot state type admin spare running release slot uptime
---- ------- -------- ------- ----- ----------------- -------------
0 online GE enabled --- erx_5-3-3p0-8.rel 0d10h:43m:19s
1 --- --- --- --- --- ---
2 --- --- --- --- --- ---
3 --- --- --- --- --- ---
4 --- --- --- --- --- ---
5 --- --- --- --- --- ---
6 online SRP-10Ge enabled --- erx_5-3-3p0-8.rel 0d10h:52m:32s
7 standby SRP-10Ge enabled --- erx_5-3-3p0-8.rel ---
8 --- --- --- --- --- ---
9 online OC12Atm enabled --- erx_5-3-3p0-8.rel 0d10h:44m:00s
10 --- --- --- --- --- ---
11 --- --- --- --- --- ---
12 online OC12Atm enabled --- erx_5-3-3p0-8.rel 0d10h:43m:59s
13 --- --- --- --- --- ---
Copyright (c) 1999-YYY5 Juniper Networks, Inc. All rights reserved.

plc-bras#sh ip arp | i 0000.0000.0000
Please wait....
YYY.XXX.47.5 21450 0000.0000.0000 ATM9/0.971329
YYY.XXX.230.53 21420 0000.0000.0000 ATM9/0.971174
YYY.84.76.183 21230 0000.0000.0000 ATM12/0.800514
YYY.84.78.111 21250 0000.0000.0000 ATM12/0.1380742
YYY.90.127.101 21390 0000.0000.0000 ATM12/0.1350785
YYY.XXX.62.153 21530 0000.0000.0000 ATM12/0.2180776
YYY.XXX.62.246 21480 0000.0000.0000 ATM12/0.1381051
YYY.XXX.62.247 21480 0000.0000.0000 ATM12/0.1410570



Posted by Walter Roberson on June 6, 2005, 4:41 pm
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:I have this Juniper ERX in my network
:What i'm worry about are the 0000.0000.0000 MAC Addresses that are
:present in the Arp Table

:Does anyone know why?

This has been discussed in the last couple of days in
comp.protocols.tcp-ip
--
"Who Leads?" / "The men who must... driven men, compelled men."
"Freak men."
"You're all freaks, sir. But you always have been freaks.
Life is a freak. That's its hope and glory." -- Alfred Bester, TSMD


Posted by on June 22, 2005, 10:46 am
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Walter, can you please show me the link
Thanks
Regards


Walter Roberson ha escrito:
> :I have this Juniper ERX in my network
> :What i'm worry about are the 0000.0000.0000 MAC Addresses that are
> :present in the Arp Table
>
> :Does anyone know why?
>
> This has been discussed in the last couple of days in
> comp.protocols.tcp-ip
> --
> "Who Leads?" / "The men who must... driven men, compelled men."
> "Freak men."
> "You're all freaks, sir. But you always have been freaks.
> Life is a freak. That's its hope and glory." -- Alfred Bester, TSMD



Posted by Walter Roberson on June 22, 2005, 6:04 pm
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|Walter Roberson ha escrito:

|> :What i'm worry about are the 0000.0000.0000 MAC Addresses that are
|> :present in the Arp Table

|> This has been discussed in the last couple of days in
|> comp.protocols.tcp-ip

|Walter, can you please show me the link

http://groups.google.ca/group/comp.protocols.tcp-ip/msg/ed4c7c37737f37e3

"Can ARP packet have zero or Broadcast address as Soure IP address??"
[sic]
--
Any sufficiently old bug becomes a feature.


Posted by Thomas Schulz on June 22, 2005, 6:27 pm
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>
>|Walter Roberson ha escrito:
>
>|> :What i'm worry about are the 0000.0000.0000 MAC Addresses that are
>|> :present in the Arp Table
>
>|> This has been discussed in the last couple of days in
>|> comp.protocols.tcp-ip
>
>|Walter, can you please show me the link
>
>http://groups.google.ca/group/comp.protocols.tcp-ip/msg/ed4c7c37737f37e3
>
>"Can ARP packet have zero or Broadcast address as Soure IP address??"
>[sic]
>--
>Any sufficiently old bug becomes a feature.

That discussion was about an IP address of zero. If you are seeing a MAC
address of zero, that would be a different situation. If I recall correctly,
we once had a problem with a system where the battery holding the ram that
contained the MAC address has died. The system tried to use a MAC address
of zero, which caused problems. I forget now the exact problems caused.
--
Tom Schulz
schulz@adi.com


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