From: Matthew Poole (matthew.poole@blueyonder.co.uk)
Date: Wed Feb 05 2003 - 07:35:34 GMT-3
I realise it's a little off topic but thought I'd give you all a crack at this
one.
I have a colleague who has been configuring 2 2950's. They are connected
together via a dot1q trunk and they both have just 2 VLAN's. Two PC's on
separate VLAN's on S1 can get DHCP addresses from servers in S2 which are in
the same VLAN's - i.e. PC 1 and Server 1 in VLAN 1, PC 2 and server 2 in VLAN
2 - no intervlan routing.
This all works fine on 12.05, however when he upgrades to 12.1 (he tried 4
versions) the PC in VLAN 2 can no longer get an IP address from the DHCP
server, VLAN 1 works fine. Interestingly, pings within VLAN 2 work fine if he
gives the PC a static address.
He has had this same issue with 3550's and 4500's as well on 2 other sites -
if anybody has done this uograde and had this same issue we'd love to here
from you and how you got round it.
The configs are below, the only thing I can see are portfast on the trunk and
no switchport mode access on the access ports. As I said previously it's only
when he upgrades that he has these problems - they work fine on 12.05.
SWITCH 1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname switch1
!
vtp mode transparent
!
vlan 2
vlan 3
!
interface FastEthernet0/1
description *** 802.1Q Port ***
switchport trunk encapsulation dot1q
switchport mode trunk
spanning-tree portfast
no ip address
!
interface FastEthernet0/2
description *** Access Port VLAN 1 ***
switchport access vlan 1
!
interface FastEthernet0/3
description *** Access Port VLAN 2 ***
switchport access vlan 2
!
Other ports as above
!
interface Vlan1
ip address 192.168.1.1 255.255.255.0
no ip route-cache
!
------------------------------------------------------------
SWITCH 2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname switch2
!
vtp mode transparent
vlan 2
vlan 3
!
interface FastEthernet0/1
description *** 802.1Q Port ***
switchport trunk encapsulation dot1q
switchport mode trunk
spanning-tree portfast
no ip address
!
interface FastEthernet0/2
description *** Access Port VLAN 1 ***
switchport access vlan 1
!
interface FastEthernet0/3
description *** Access Port VLAN 2 ***
switchport access vlan 2
!
Other ports as above
!
interface Vlan1
ip address 192.168.1.2 255.255.255.0
no ip route-cache
.
This archive was generated by hypermail 2.1.4 : Sat Mar 01 2003 - 11:06:09 GMT-3