Gary
Guest
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 Posted: Mon Feb 25, 2008 1:22 pm Post subject: VLAN Issue |
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2811 connected to 3548. Simple, but one VLAN fails. I have adopted a network
and have seen this config before as on the switch port below but cannot
recall what effect it has or why it would be done this way.
All VLANS below work fine except VLAN 5
Machines in VLAN 5 are all connected to the switch
Router interface to switch config
======================
interface GigabitEthernet0/0
description Handoff to lonrhs1 (Redbus LAN)
no ip address
duplex full
speed 100
interface GigabitEthernet0/0.19
encapsulation dot1Q 19
ip address 99.12.23.1 255.255.255.0
!
interface GigabitEthernet0/0.22
encapsulation dot1Q 22
ip address 99.12.1.172 255.255.255.248
!
interface GigabitEthernet0/0.816
encapsulation dot1Q 816
ip address 99.12.48.62 255.255.255.252
interface GigabitEthernet0/0.5
encapsulation dot1Q 5
ip address 99.12.0.129 255.255.255.248
Switch port to router
==============
interface FastEthernet0/45
duplex full
speed 100
switchport access vlan 3
switchport trunk encapsulation dot1q
switchport trunk native vlan 3
switchport trunk allowed vlan 1,3,5,12,14,17-19,22,60,642,691,692,816
switchport trunk allowed vlan add 1002-1005
switchport mode trunk
!
I Have seen trunks where the vlan and native vlan are the same and from
memory I think it fully negates the VLAN and makes it a regular trunk??? but
I cannot see why other VLANS work fine but VLAN 5 cannot see the machines on
the switch.
Anyway to debug or check would be appreciated.
Gary |
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