09-13-2007 08:19 PM - edited 03-03-2019 06:45 PM
Help!
I will be configuring a 2611 router with two t1 for internet connection. How do I configure the controller card and the serial interface? I intend to bundle the two t1?s for more speed. Please help with basic configuration
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09-16-2007 12:17 PM
Cecil
I believe that you are describing putting both of the T1s into a multilink bundle. This treats both physical links as part of a single logical interface. Part of the concept of this is that the physical interfaces do not get IP addresses and the IP address is configured on the single logical interface. Your config would look something like this (obviously with the address assigned to you by your provider and with interface numbering that matches your router). You might want the commands for fair-queue and mroute or you might not want them. They were part of the config from a router that I configured and they work for that installation. They might not be needed in your installation. Also note that the provider must configure their interfaces in a similar manner.
interface Multilink1
ip address 172.16.209.86 255.255.255.252
ppp multilink
ppp multilink fragment disable
ppp multilink group 1
!
interface Serial0/0
description connection to Internet
no ip address
encapsulation ppp
no ip mroute-cache
no fair-queue
service-module t1 timeslots 1-24
ppp multilink
ppp multilink group 1
!
interface Serial1/0
description connection to Internet
no ip address
encapsulation ppp
no ip mroute-cache
no fair-queue
service-module t1 timeslots 1-24
ppp multilink
ppp multilink group 1
!
HTH
Rick
09-13-2007 09:13 PM
hi
can you post the model of the T1 card here which can be useful to suggest the recommended config for the same.
are these lines connecting to the same end point device at the remote location ?
if its then you can have a logical bundle created by grouping the physical links.
regds
09-14-2007 07:58 AM
The 2611 came with 1 t1 WIC card installed with a single t1 port. I installed another WIC card in the other slot which also has 1 t1 port on it
I now have 2 t1 ports on the 2611. I will be connecting the 2 t1's into the 2 t1 interface port.
these lines are connecting to the same end point which is my ISP. the lines are for internet service
I hope this info will help.
09-14-2007 09:25 AM
I have a 2621XM router that's doing what you're trying to do. I have it configured with 2 T-1DSU WICs and below is part of my config that should get you started:
ip cef
ip cef accounting per-prefix non-recursive
interface Serial0/0
ip address x.x.x.x x.x.x.x
encapsulation ppp
service-module t1 timeslots 1-24
interface Serial0/1
ip address x.x.x.x x.x.x.x
encapsulation ppp
service-module t1 timeslots 1-24
2 Routes are setup:
ip route 0.0.0.0 0.0.0.0 Serial0/0
ip route 0.0.0.0 0.0.0.0 Serial0/1
09-14-2007 10:25 AM
Thanks for your reply.
it looks like you are using the 2 t1 separately. Correct me if am wrong. I?ll like to bundle my up for more bandwidth.
Your point-to-point or just internet lines?
Mine are just internet lines
09-16-2007 12:17 PM
Cecil
I believe that you are describing putting both of the T1s into a multilink bundle. This treats both physical links as part of a single logical interface. Part of the concept of this is that the physical interfaces do not get IP addresses and the IP address is configured on the single logical interface. Your config would look something like this (obviously with the address assigned to you by your provider and with interface numbering that matches your router). You might want the commands for fair-queue and mroute or you might not want them. They were part of the config from a router that I configured and they work for that installation. They might not be needed in your installation. Also note that the provider must configure their interfaces in a similar manner.
interface Multilink1
ip address 172.16.209.86 255.255.255.252
ppp multilink
ppp multilink fragment disable
ppp multilink group 1
!
interface Serial0/0
description connection to Internet
no ip address
encapsulation ppp
no ip mroute-cache
no fair-queue
service-module t1 timeslots 1-24
ppp multilink
ppp multilink group 1
!
interface Serial1/0
description connection to Internet
no ip address
encapsulation ppp
no ip mroute-cache
no fair-queue
service-module t1 timeslots 1-24
ppp multilink
ppp multilink group 1
!
HTH
Rick
09-18-2007 09:29 AM
I have a similar situation. Two T1 lines are from the same ISP.
Will the second T1 line be up if the first T1 line goes down?
If this will work then I don't need BGP.
09-18-2007 07:59 PM
hi
in case of redundancy you dont need to use bgp since you can achieve the same using static routes.
but the similar setup has to be done at sp end too to have the fallback triggered.
regds
09-18-2007 11:30 PM
HI Rick and Prem,
Urgent Requirement:
--------------------------
Hello All,
Router 1<----------->Router 2
Currently i have a E1 circuit between R1 and R2 Routers.
I am purchasing a new E1 circuit for Load Sharing and High availaibility.
I wish to Bundle the both the E1 Circuits as Single Virtual Link.
Please help me with the Sample Configuration of "Multi Link PPP"
Note: Both the E1 Circuits belongs to two different Service Providers.
Thanks in Advance for Help
Best Regards,
Guru Prasad R
09-18-2007 11:37 PM
hi
Are you availing normal TDM Point to Point circuits from the Telco if yes then the config posted by Rick is enough except the timeslot command.
Also do make sure that you are doing a proper tests for errors/reliability of both the links before putting them in the bundle.
You will experience degraded performance if anyone of the circuit contains errors.
regds
09-19-2007 12:00 AM
HI Prem,
Thanks for Info. Yes, its a dedicated Point-to-Point Circuit only.
Question: In this Multilink PPP Environment, what will happen in a Situation if one of the Circuit goes DOWN.
Whether the traffic will automatically carried forward by the Second Link ?
Thanks in Advance for Help
Best Regards,
Guru Prasad R
09-19-2007 12:24 AM
Yes you are rite the traffic will go via multilink (logical link) which will be up based on the status of active link.
Thats where it becomes difficult in finding out whether both the links are up since you will have reachability even with a single link (which is a member of the bundle).
regds
09-19-2007 04:26 AM
HI Prem & Rick,
Thanks for Help and Have Rated your Post.
Best Regards,
Guru Prasad R
09-19-2007 01:51 PM
Then what's the benefit of BGP? My ISP wanted to set up BGP to route both inbound and outbound traffic.
Is there any security risk in implementing multilink?
09-19-2007 04:42 AM
Thanks to everyone especially you Rick. My multilink is up
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