can't get inter vlan routing to work on the same phyical i/f

[walter baziuk]

we are unable to get any user traffic between sub nets on the same physical interface. The rtr and sw have a trunk that passes all VLANs and that seems to work. The rtr and switch can see every device. We also can’t communicate between any two sub nets that are on the same physical interface. no ACL to block traffic in either direction

Even a device on the same subnet can’t ping or see other device on the subnet. However everyone can see the rtr and sw and vice versa.

the trunk i/f have this to ensure traffic can flow in both directions

no ip split-horizon

Theses two files are from our unclass tested. We use this environment to test out solutions before deployment. ERR is the rtr and ERS is the switch. The link between this rtr and the others is done right now, but that does not affect the current issue

Any tips or recommendations would be most helpful

[Marwan ALshawi]

are the devices taking the right ip addressing via DHCP service from the router ?

i can see you have multiple subnets while only one

ip dhcp pool f2f-SB-VoIP

import all

network 20.1.100.128 255.255.255.248

default-router 20.1.100.129

option 150 ip 20.1.100.252

lease 0 4

and each pool for each subnet has to have the default gateway as the router IP of that subnet/subinterface

by the way you do not need the helper address as the request will go direct over the trunk to the relevalnt subInterface of each Vlan

and this is got nothing to do with Siplit Horizon here

Hope this Help

[walter baziuk]

hi

i have limited dhcp pools as most systems are on fixed IP, vs. DHCP.

The fixed ones use the correct mask gateway etc. I will add the help for the dhcp pool though.

Any idea why the fixed users have issues, but ping etc from eother rtr or switch can get frorm /to any vlan?

[walter baziuk]

I have removed these from the rtr  on all I/F and van

   No ip unreachable

As well as

  No redirect

Also, I remove the ip route on the switch

Same problem (;

My vlan pc can ping 192.168.0.1 and all other  i/f but not 192.168.0.192

My router and switch  can ping 192.168.0.1 and 192.168.0.192

When I run tracert on the pC, I only get one from 20.10.100.1after that reply just * * *

Let me know if you know anything else that I can try

[walter baziuk]

Hello

I think i found the glitch

i removed

no ip proxy arp

on the main trunk I/F as well as the subnet I/F. now it reads

ip proxy arp

Voila, i can now do inter vlan trunking on the same physical IF

cheers all, any comment on why that now works

i have no proxy server