02-05-2008 08:35 AM - edited 03-05-2019 08:57 PM
Hi,
I config two CAT 3750 switches, one is on 32/F; other is on 8/F. there are two in-house fibers to be connected to each other. router is on 32/F.
I would like 192.168.16.0, 192.168.17.0 traffic via fiber A
172.16.16.0, 172.16.17.0 traffic via fiber B
It seems that my config is not working.
1. How to config the trunks to run different traffic?
2. any problem if I do not config VLAN1 on switch?
rgds
32/F segment
192.168.16.0/24
192.168.17.0/24
192.168.18.0/24
192.168.19.0/24
172.16.16.0/24
172.16.17.0/24
172.16.18.0/24
10/F segment
192.168.16.0/24
192.168.17.0/24
192.168.24.0/24
192.168.25.0/24
172.16.16.0/24
172.16.17.0/24
! R1
!
interface GigabitEthernet0/0
no ip address
!
interface GigabitEthernet0/0.1
encapsulation dot1Q 1 native
ip address 172.16.1.1 255.255.255.252
ip nat inside
!
interface GigabitEthernet0/0.2
encapsulation dot1Q 2
ip address 192.168.16.1 255.255.255.0
ip nat inside
interface GigabitEthernet0/0.3
encapsulation dot1Q 3
ip address 192.168.17.1 255.255.255.0
ip nat inside
interface GigabitEthernet0/0.12
encapsulation dot1Q 12
ip address 172.16.16.1 255.255.255.0
ip nat inside
interface GigabitEthernet0/0.13
encapsulation dot1Q 13
ip address 172.16.17.1 255.255.255.0
ip nat inside
!
Interface FastEthernet1
ip address 209.x.x.x 255.255.255.252
ip nat outside
!
ip nat pool office 209.x.x.x 209.x.x.x netmask 255.255.255.252
!
ip nat inside source 10 interface FastEthernet1 overload
!
access-list 10 permit 172.16.0.0 0.0.0.255
access-list 10 permit 192.168.16.0 0.0.0.255
access-list 10 permit 192.168.17.0 0.0.0.255
access-list 10 permit 172.16.16.0 0.0.0.255
access-list 10 permit 172.16.17.0 0.0.0.255
!
! switch
interface gigabitethernet2/0/1
description Trunk to router A GE 0/0, fiber A
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface gigabitethernet2/0/2
description Trunk to router A GE 0/1, fiber B
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/1
switchport access vlan 2
!
interface FastEthernet0/2
switchport access vlan 3
!
interface FastEthernet0/8
switchport access vlan 12
!
interface FastEthernet0/9
switchport access vlan 13
!
Solved! Go to Solution.
02-05-2008 09:18 PM
Hi Anita,
You should move the 172.16.x.x subnets (vlans 12 and 13) from GE0/0 to GE0/1.
This way the traffic of 172.16.x.x subnets will go on fiber B.
interface GigabitEthernet0/1
no ip address
!
interface GigabitEthernet0/1.12
encapsulation dot1Q 12
ip address 172.16.16.1 255.255.255.0
ip nat inside
!
interface GigabitEthernet0/1.13
encapsulation dot1Q 13
ip address 172.16.17.1 255.255.255.0
ip nat inside
Try this configuration.
If it doesn't work, please send me more info about your present configuration: full running-configs, drawing about physical connections, etc.
Cheers:
Istvan
02-05-2008 01:25 PM
Hi Anita,
It seems to me that GE 2/0/2 of your switch is connected to GE 0/1, fiber B, on router R1 but I don't see any layer 3 config on GE 0/1.
Cheers:
Istvan
02-05-2008 05:37 PM
Hi,
how to config it? I do not have any idea? please advise
rdgs
02-05-2008 09:18 PM
Hi Anita,
You should move the 172.16.x.x subnets (vlans 12 and 13) from GE0/0 to GE0/1.
This way the traffic of 172.16.x.x subnets will go on fiber B.
interface GigabitEthernet0/1
no ip address
!
interface GigabitEthernet0/1.12
encapsulation dot1Q 12
ip address 172.16.16.1 255.255.255.0
ip nat inside
!
interface GigabitEthernet0/1.13
encapsulation dot1Q 13
ip address 172.16.17.1 255.255.255.0
ip nat inside
Try this configuration.
If it doesn't work, please send me more info about your present configuration: full running-configs, drawing about physical connections, etc.
Cheers:
Istvan
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