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ee-gdFlag for United Kingdom of Great Britain and Northern Ireland

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Cisco 4507R toubleshoot accessing on vlan 40 from vlan 1

we added a bt infinity connection and I need to add another vlan to our 4507R, but can't get it to work and I can't access it from another vlan.

this is what I've setup

vlan 40
 name BT Infinity

interface Vlan40
 description ----- BT Infinity - vlan 40 - -----
 ip address
 ip helper-address
 no ip redirects

as part of sh ip route I can see:
C is directly connected, Vlan40

from the 4507R i can ping the infinity router
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

but i can't ping it or open the admin page from any machine on vlan 1.

the bt infinity router is connected to a smaller switch, which is connected to interface GigabitEthernet6/11 on the 4507R and that has no access lists applied etc
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 1,40
Avatar of BigPapaGotti

Does this smaller switch have a trunk set up between itself and the 4507R? Are there other VLANS confirgured or is VLAN 40 the First VLAN you are adding other than VLAN1? You may need to enable "ip routing" from Global Configuration Mode in order to allow the VLANS to communicate with each other. Also if you do a "show ip interface brief" do the correct VLANS and interfaces show "up"
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yes the smaller switch has a trunk configured and many other vlans configured on the 4507R. the switch is routing fine between the other vlans. there are three other vlans configured on the smaller switch too - all working fine too.

interfaces look OK  too

sh ip interface brief
Interface              IP-Address      OK? Method Status                Protocol

Vlan1               YES NVRAM  up                    up      

Vlan40           YES NVRAM  up                    up      

GigabitEthernet6/11    unassigned      YES unset  up                    up
Are you able to provide a sanitized running configuration of the 4507 and the smaller switch so that we can have a closer look at the configuration and issue.
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there you go an edited version of sh run
Does the router have a route to access hosts on VLAN1?
Avatar of ee-gd


we don't have a separate router. This cisco 4507R is the switch at the core albeit layer 3 one and there is PIX515E firewall on, which is where our main internet connection is connected.

in sh ip route vlan1 is directly connected is variably subnetted, 2 subnets, 2 masks
C is directly connected, Vlan1
S [1/0] via
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in fact you are spot on.

I've just spoken to cisco and they gave the same instructions - setup route on the BT Infinity router for our vlans.

Thanks a lot for your help
Glad to hear that solved it.

No problem at all, glad to help!