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Posted by Trendkill on October 29, 2007, 11:01 am
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> Hi,
>
> I'm new in cisco networking.
> I have 3 cisco 3560 layer 3 switch. I defined the vlan
> as follow: (vlan1 is the manangment vlan)
> I can ping from server1 (on switch1) to server2/server3 (on switch2).
>
> I can ping back from server2 (on switch2) to server1 (on switch1).
> I can ping back from server3 (on switch2) to server1 (on switch1).
>
> I can ping from server4 (on switch3) to server2/server3 (on switch2).
> I can ping from server4 (on switch3) to server1 (on switch1).
>
> I can ping from server5 (on switch3) to server3 (on switch2).
> But I found I can't ping from server5 (on switch3) to server2 (on switch2).
> OR I found I can't ping from server5 (on switch3) to server1 (on switch1).
>
> My question is, Is that possible to make a connection between server5
> (which is on vlan4 of switch 3) to the server1 or server2 (which is on
> vlan2).
> ( Certainly , I can ping from server5 to server4.)
> ======================================================================
> [switch1] vlan1:180.40.1.254 vlan2:180.42.1.254 {port 1-23}
>
> [switch2] vlan1:180.40.1.253 vlan2:180.42.1.253 {port 1-12}
> vlan3:180.42.33.254{port 13-22}
> vlan4:180.42.31.253{no port assigned)
>
> [switch3] vlan1:180.40.1.252 vlan2:180.42.1.252 {port 1-12}
> vlan3:180.42.33.253{no port assigned}
> vlan4:180.42.31.254{port 13-23}
>
> (vlan 2)
> ---------
> |server1|
> ---------
> |
> |
> -------------------------------------
> | 1| 3| 5| 7| 9|11|13|15|17|19|21|23|
> ------------------------------------- [switch1]
> | 2| 4| 6| 8|10|12|14|16|18|20|22|24|
> -------------------------------------
> |
> |
> |
> (vlan 2) (vlan 3) |
> --------- --------- |
> |server2| |server3| |
> --------- --------- |
> | | |
> | | |
> -------------------------------------
> | 1| 3| 5| 7| 9|11|13|15|17|19|21|23|
> ------------------------------------- [switch2]
> | 2| 4| 6| 8|10|12|14|16|18|20|22|24|
> -------------------------------------
> |
> |
> |
> (vlan 2) (vlan 4) |
> --------- --------- |
> |server4| |server5| |
> --------- --------- |
> | | |
> | | |
> -------------------------------------
> | 1| 3| 5| 7| 9|11|13|15|17|19|21|23|
> ------------------------------------- [switch3]
> | 2| 4| 6| 8|10|12|14|16|18|20|22|24|
> -------------------------------------
>
> (P.S. All server have the default gateway to the corresponding vlan segment)
>
> Thank you very much for any help,
>
> Wayne Wan
You are talking about a layer 3 issue it sounds like. Where is the
router interface for VLAN 4? Can server 5 ping its gateway? How
about ping server 4 on the same switch? If not, you need to check
trunking of vlan 4 back to the router that owns all these networks.
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