Layer 3 VLAN Routing

Unanswered Question
Jul 12th, 2007
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3550 switch? i followed the procedures from http://www.cisco.com/en/US/tech/tk389/tk815/technologies_configuration_example09186a008019e74e.shtml and am able to route between VLANs on the switch, but i cant ping the next hop router



Internet

^

|

r1 s1 192.168.1.100

|

| <----point to point t1

|

r2 s0 192.168.1.101

r2 f0 172.16.20.35

|

|

3550 f0 172.16.20.36

|

/ \

/ \

/ \

vlan2 vlan3

10.6.1.2 10.6.2.2


i cant ping 192.168.1.101 from vlan3...is there any configuration required that isnt listed on the page i referenced?

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sundar.palaniappan Thu, 07/12/2007 - 16:27
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It appears R2 doesn't know how to route traffic to 10.6.2.x network. Add static routes on R2 to route traffic to vlan 2 & 3 to forward the traffic to the 3550 switch. Alternatively, you can enable a dynamic routing protocol between the 3550 and R2.


HTH


Sundar

glen.grant Thu, 07/12/2007 - 17:38
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Yes you either have to add static routes on both sides so that both sides know how to get to the subnets on the other box or implement a routing protocol like ospf or eigrp. Static routes are a pain to keep up use a routing protocol if possible and the 3550 supports it.

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