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VLAN traffic to WAN (Hop between Core to Router)

KCollinson
Advisor

VLAN traffic to WAN (Hop between Core to Router)

HI All, Please help...

3x VLAN
VID 1
VID 2 Data (Router resides on this VLAN)
VID 3 VoIP

All uplinks have VLANs 2&3 tagged on all edge switches.
All edge switches has Default gateway as IP of the default VLAN on core.

Core has default route to WAN router.
WAN router has new static routes supportin VLAN traffic on VID 2 & 3.

I can ping outside IP address (Not DNS) on VLAN 3 when i do a tracert on VID 3 the hop between Core switch to Router times out but the hops cont and reach thier destination.

I am having DNS problems on VID 3 even when using off site DNS servers which i believe is the result of this hop problem.

Any ideas?

Many thanks,
Kc.
1 REPLY
Pieter 't Hart
Honored Contributor

Re: VLAN traffic to WAN (Hop between Core to Router)

>>>
the hop between Core switch to Router times out but the hops cont and reach thier destination
<<<
how did you check ?
do you get response back? if so they also "hop back".
there may be a filter in it's path (firewall or just ACL on the router or the coreswitch) that doesn't allow this device answering this ICMP traceroute packets, but do allow them to be forwarded to the next hop and pass the response.