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Webcast-Catalyst9k
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L2 Vlan subnet and L3 subnets are same

hi tema,

we got L2 vlan running 10.1.1.0 and L3 vlan configured 10.1.1.0 subnet.

But we are using L2 vlan for communicate video conference and not interacting with L3 vlan.

Once in a month, we are seeing problem in switch i.e., next hop router ip address will not ping. we need to reboot to make ping.

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Hall of Fame Super Gold

L2 Vlan subnet and L3 subnets are same

I do not understand your post. When you have a layer 2 VLAN it is running completely at layer 2 and there is no IP address at layer 2. When you say that your layer 2 VLAN is running 10.1.1.0 then you have added layer 3 to that VLAN.

If the switch can sometimes not ping the router address then it would help us if you would provide details about the configuration of the switch and about its connection to the router. On which switch port is the router connected? How is that port configured?

Also some other details about the problem would be helpful:

- when the problem happens can you do show arp on the switch and see if the MAC address for the router is in the ARP table?

- when the problem happens can you do show interface of the affected ports and post the output?

HTH

Rick

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