Solved: intervlan routing multilayer switch C3750

eezergeezer · ‎04-19-2011

Hello Guys,

I have a router >>>connected to a c3750 >>> connected to a customer switch..

Router ip Gi01 : 172.31.102.6/24

|

c3750

port Gi01= vlan 70 svi: 172.31.102.7/24

port Gi06= vlan 72 svi: 10.1.155.33/28

|

customer switch (cisco unknown device)

port GiX =vlan XX svi: 10.1.155.34/28

I have the following routes:

Router:

ip route 10.1.155.32/28 via 172.31.102.7

switch:

ip route 10.1.155.32/28 via vlan 72

I can ping the customer 10.1.155.34 ip from the switch.

I cannot ping the 10.1.155.34 from the router..

What am i missing here? Would I need to create a sub int on the router to reach the customer 10.1.155.34 address?

trace route 10.1.155.34

Tracing the route to 10.1.155.34

1 172.31.102.7 0 msec 0 msec 4 msec
2 * * *
3 * * *

Please help .. Am I doing something totally wrong here?

thanks in advance...

Alvaro Garcia · ‎04-19-2011

It seems that your customer's switch is getting a ping request witha source address of 172.31.102.6 but it doesnt know how to reach 172.31.102.6....

so I would say that you need to make sure that the customer's switch has a route (static or dinamic) pointing to your 3750 switch, or configure the deafult gateway of your customer's switch to point to 10.1.155.33...

You dont need this on the 3750 switch:

ip route 10.1.155.32/28 via vlan 72

This because it is already on the routing trable because it is a directly connected route.

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