04-16-2010 07:30 AM - edited 03-04-2019 08:11 AM
MY requirement is to terminated Two service provider on the same router and same interface.
Router is 2801 with two FE ports.
Two Service provider links are terminated on 2960 Switch, trunk is configured between switch and Router.
Interface fa 0/0
description " Goes to LAN"
ip address 192.168.1.253 255.2555.255.0
Interface fa 0/1
no shutdown
Interface fa 0/1.10
description " SP1"
encap dot1q 10
ip address 196.8.2xx.x 255.255.255.248
Interface fa 0/1.11
description " SP2"
encap dot1q 11
ip address 198.102.x.x 255.255.255.240
Interface fa 0/1.15
description "Connected to Switch"
encap dot1q 15
ip address 10.1.1.100 255.255.255.0
ip route 0.0.0.0 0.0.0.0 10.1.1.253
The above configuration dont work on sub-interface with Two Service-provider
If I configure only SP1 on interface fa 0/1 it works
If I configure only SP2 on interface fa 0/1 it works
04-16-2010 07:39 AM
Hi,
Are you terminating SP connections to Switch ?
We need to terminate SP to router and switch is for LAN. Can you shed more info on this.
Thanks,
Hari
04-16-2010 07:43 AM
I mean physical connection of two SP on switch only
How would you connect two SP on single interface of router.
04-16-2010 07:46 AM
Are the ISP links vlan 10 & vlan 11 ?
What is vlan 15 used for ?
What is the native vlan on the switch ?
Jon
04-16-2010 08:15 AM
Vlan 10 & Vlan 11 are for ISP
VLAN 15 to manage switch on which ISP connection is terminated
VLAN 100 is native
Switch port configuration connecting to Router.
interface FastEthernet0/1
switchport trunk native vlan 100
switchport trunk allowed vlan 7-13
switchport mode trunk
spanning-tree portfast
I added on the router2801
interface GigabitEthernet0/1.100
encapsulation dot1Q 100 native
but this doesnt seems to work as well.
04-16-2010 08:36 AM
Ok,
I got it now. The problem seems to be due to native vlan.
In your switch Trunk try configuring Allowed vlan including 100 and rest of the vlan in it
04-16-2010 08:41 AM
native vlan is already configured but not working
SW configuration
interface FastEthernet0/1
switchport trunk native vlan 100
switchport trunk allowed vlan 7-13
switchport mode trunk
spanning-tree portfast
04-16-2010 08:49 AM
Is it correct?
earlier you mentioned FE and now GE
also
can u test using extended ping ie, specify the source ip address
from the router and check whether you are able to reach all the network vlan
04-16-2010 08:58 AM
Hi,
1. Try removing port-fast on the trunk port.
2. Try removing any native VLAN see if you can ping to both ISP side IP address with corresponding source IP address, if that works problem is most likely on the router configuration like default route or routing protocol.
3. Also check correct VLAN membership of the ports where you are connecting the ISP side cables. Those shoud be in correct VLAN.
Hope this helps.
Thanks
Subodh
04-16-2010 08:53 AM
Well your config is fine.
ip route 0.0.0.0 0.0.0.0 10.1.1.253
what is the above route ie. that seems to be on vlan 15 which is just a management vlan isn't it.
Presumably you have assigned the switchports on the switch into the correct vlans ie. vlan 10 & 11 ?
How are you confirming it isn't working ?
Jon
04-16-2010 01:12 PM
VLAN 15 is management Vlan, this is to ensure I can reach switch from the router.
How are you confirming it isn't working :::: pinging service provider router (next-hop) with source address doesnt ping,
I was worrying on the configuration, if thats incorrect, jon you reply made me smile
On Cisco Website I couldnt find similar scenario or sample configuration
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