RE: cat 3550 - layer 3 etherchannel, vtp

From: Church, Chuck (cchurch@wamnetgov.com)
Date: Fri Oct 24 2003 - 09:53:09 GMT-3


VTP info exchange requires a trunk - always. Since you've disabled switchport on the two physicals and the logical, trunking (and VTP) will never be possible.

Chuck Church
CCIE #8776, MCNE, MCSE
Wam!Net Government Services
13665 Dulles Technology Dr. Ste 250
Herndon, VA 20171
Office: 703-480-2569
Cell: 703-819-3495
cchurch@wamnetgov.com
PGP key: http://pgp.mit.edu:11371/pks/lookup?op=index&search=cchurch%40wamnetgov.com

-----Original Message-----
From: Mike Williams [mailto:ccie2be@swbell.net]
Sent: Friday, October 24, 2003 8:46 AM
To: 'Paul Chen'; ccielab@groupstudy.com
Subject: RE: cat 3550 - layer 3 etherchannel, vtp

Essentially, you have the two switches configured with a point-to-point
L3 link. VTP won't operate over this as it's L3, not L2. Imagine
having two switches, each connected to separate ethernet interfaces on a
common router (assumming the router isn't bridging, etc). They won't
share VTP info either...... Same situation.

HTH,
Mike W.

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Paul Chen
Sent: Friday, October 24, 2003 12:45 AM
To: ccielab@groupstudy.com
Subject: cat 3550 - layer 3 etherchannel, vtp

Hi,

I have 2 cat 3550 switches connected via a layer 3 etherchannel. Cat 1
is a vtp server and Cat 2 is a vtp client.

Q1. Changes in Cat 1's vlan configs does not propagate to Cat 2 ( Vtp
client ) for layer 3 etherchannel ?

It works for layer 2 etherchannel though. I am running 12.1(14)

Any help appreciated.

Cat 1:

interface Port-channel1
 no switchport
 ip address 140.4.21.1 255.255.255.252

interface FastEthernet0/23
 no switchport
 no ip address
 channel-group 1 mode desirable
!
interface FastEthernet0/24
 no switchport
 no ip address
 channel-group 1 mode desirable

Cat 2:

interface Port-channel1
 no switchport
 ip address 140.4.21.2 255.255.255.252

interface FastEthernet0/23
 no switchport
 no ip address
 channel-group 1 mode desirable
!
interface FastEthernet0/24
 no switchport
 no ip address
 channel-group 1 mode desirable

Thanks,
Paul



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