07-21-2008 09:15 AM - edited 03-06-2019 12:19 AM
All,
I have two (2) catalyst 4948's that I am trying to get to talk to each via a trunk and I also have 1 routed interface on each switch. I have one routed interface per switch and between them I have a L2 trunk. What I want is if a PC is connected to switch 1 and has to go to switch 2 I don't want it to take the routed interface out on switch 1 and come back in on switch 2. I want local traffic to flow between the switches via the trunk. The only problem is, it isn't working. I have routes on both switches but I can't talk between the switches over the trunk. Can someone shed some light on this. Thanks.
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07-22-2008 09:36 AM
If your using VTP, use vtp version 2.
Do this on both switches. This will set them as both servers.
# vtp mode server
# vtp version 2
# vtp domain xxx
# vtp password mypassword
# vtp pruning
"show vlan brief" should show vlan 41 on both switches.
07-21-2008 12:29 PM
Can you post configs?
Keep in mind a trunk carries vlans, which are layer 2.
07-21-2008 01:32 PM
okay notice below the configs on sw2 and sw1. There is a routed interface on each switch and the other remaining interfaces are layer 2 trunks. I want local traffic to run between the trunks and traffic destined for the outside to just go out the routed interface. Is this possible the way I have it set up? Or should I just put both routed interfaces on one switch and keep the trunk?
SW2
no aaa new-model
ip subnet-zero
no ip domain-lookup
ip domain-name NET.SBA.GOV
!
no ip bootp server
cluster run
!
!
!
power redundancy-mode redundant
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
interface GigabitEthernet1/1
switchport access vlan 41
switchport port-security maximum 3
switchport port-security aging time 15
interface TenGigabitEthernet1/49
description Trunk to switch1
!
interface TenGigabitEthernet1/50
description Uplink to Dist 2
no switchport
ip address 165.110.17.153 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip hello-interval eigrp 1 1
carrier-delay msec 0
!
interface Vlan1
no ip address
shutdown
!
interface Vlan41
ip address 0.0.41.254 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
!
router eigrp 1
network 0.0.17.152 0.0.0.3
eigrp stub connected summary
no auto-summary
passive-interface default
no passive-interface TenGigabitEthernet1/50
redistribute connected
----------------------------------------------
SW1
no aaa new-model
ip subnet-zero
ip cef load-sharing algorithm original
!
cluster run
!
!
!
power redundancy-mode redundant
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
ip ssh version 2
interface GigabitEthernet1/1
switchport access vlan 41
switchport port-security maximum 3
spanning-tree portfast
interface TenGigabitEthernet1/49
no switchport
ip address 0.0.17.97 255.255.255.252
ip hello-interval eigrp 1 1
carrier-delay msec 0
!
interface TenGigabitEthernet1/50
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 41
switchport mode trunk
!
interface Vlan1
no ip address
!
interface Vlan41
ip address 0.0.41.253 255.255.255.0
!
router eigrp 1
network 0.0.17.96 0.0.0.3
eigrp stub connected summary
no auto-summary
passive-interface default
no passive-interface TenGigabitEthernet1/49
redistribute connected
07-21-2008 05:12 PM
Your trunk on switch2 is not configured.
on sw2 add this.
interface TenGigabitEthernet1/49
description Trunk to switch1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 41
switchport mode trunk
This way if PC1 sitting on sw1 port g1/1 wants to send traffic to PC2 sitting on sw2 port g1/1, it will use the trunk. PC1 will arp for PC2 mac address since it will be on the same subnet and the switch will feed it over the trunk.
07-22-2008 05:31 AM
Okay, thanks I got my trunks set. Now I need my vlans set I am running VTP v1 but still am not seeing vlan 41 on both switches. Can you shed some light on this?
07-22-2008 09:36 AM
If your using VTP, use vtp version 2.
Do this on both switches. This will set them as both servers.
# vtp mode server
# vtp version 2
# vtp domain xxx
# vtp password mypassword
# vtp pruning
"show vlan brief" should show vlan 41 on both switches.
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