11-05-2008 06:49 AM - edited 03-06-2019 02:19 AM
Hi
I have a remote office with a 2960 24 port switch connected to 2 2600 routers (redundancy). I'm using sub-interfaces on the routes configured for .1Q encapsulation to trunk 2 VLAN's from the switch to the routers.
1 of the routers only seems to see 1 of the VLANs. Here's the config of the router
interface FastEthernet0/0
no ip address
no ip redirects
speed 100
full-duplex
!
interface FastEthernet0/0.1
encapsulation dot1Q 1
ip helper-address 10.90.200.65
ip helper-address 10.90.202.65
no ip redirects
shutdown
standby 1 ip 10.90.173.1
standby 1 priority 200
standby 1 preempt delay minimum 240
standby 1 track Serial0/0
!
interface FastEthernet0/0.2
encapsulation dot1Q 26
ip address 10.90.26.3 255.255.255.0
no ip redirects
standby 10 ip 10.90.26.1
standby 10 priority 150
fa0/0.1 VLAN 1 can't even ping it's HSRP neighbor nothing in it's arp cache either.
11-05-2008 06:56 AM
Whats the IP address on FA 0/0.1?
You only have the HSRP address configured
11-05-2008 06:58 AM
Also FA 0/0.1 is shutdown
11-05-2008 06:59 AM
Yeah I had it shut down so it doesn't mess with the other router. I didn't realize I left out the interface address! thanks I'm going to give it a try right now.
11-05-2008 07:03 AM
I put in the address for fa0/0.1 and turned up the port but still wasn't able to ping across to the other router's interface nor anything on that VLAN.
11-05-2008 07:05 AM
Are the switchport configured as dot1q trunks
11-05-2008 07:12 AM
The switch only supports .1Q encapsulation so here is the config on the ports connected to the routers
interface FastEthernet0/15
description trunk to rtr1
switchport mode trunk
switchport nonegotiate
speed 100
duplex full
interface FastEthernet0/24
description trunk to rtr2
switchport mode trunk
switchport nonegotiate
speed 100
duplex full
port 0/15 is connected to the working router and 0/24 is the one not working.
11-05-2008 07:10 AM
I would also change from vlan 1 to another
vlan.
Check that you have configured the vlans on the switch
!
vlan database
vlan 1
vlan 26
vlan x
exit
!
11-05-2008 08:48 AM
Yeah I was planning to but I inherited this network and it's on my to do list. It shouldn't be a show stopper though because it is working on the other router.
11-05-2008 07:13 AM
for the interface FastEthernet0/0.1
change encapsulation dot1q 1
to
encapsulation dot1g 1 native
That should fix you all up :)
This will allow the trunk to form :)
on a side bar the switch has to be configured as a trunk on the other end you have to have the vlans in the database and if you change the native vlan on the switch side you wil have to create another subinterface on the router with that vlan specified as native :)
11-05-2008 08:40 AM
I tried that but it doesn't take. I was concerned from the beginning that I'm running Version 12.1(20) and it might be sort of buggy or different. My working router is running Version 12.3(6f) and I do have the native in there. I haven't seen anything in the 12.1 notes that indicates this would be a problem though.
11-05-2008 08:46 AM
This is getting confusing.
Why dont you post the switch config as well as the router configs. And make sure you post the configs that SHOULD be there (ie get rid of "shutdowns"
Thanks
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