jmcrae72
asked on
configuring two serial interfaces for Internet on a cisco 2621xm
i have a cisco 2621xm with two csu/dsu and i want to connect an Internet T-1 to each of them and have traffic flow through both of them simultaneously. i was given one IP for both circuits and a public LAN block.
this is the config i plan on using for both serial interfaces -
interface Serial0/0
description Qwest Internet
ip address 50.x.x.x 255.255.255.252
ip verify unicast reverse-path
no ip redirects
no ip unreachables
no fair-queue
no cdp enable
this will only be a Internet router so i am thinking i will only need to configure a default route to make - correct?
please let me know if you need more information.
thanks in advance for your help!
jerry
this is the config i plan on using for both serial interfaces -
interface Serial0/0
description Qwest Internet
ip address 50.x.x.x 255.255.255.252
ip verify unicast reverse-path
no ip redirects
no ip unreachables
no fair-queue
no cdp enable
this will only be a Internet router so i am thinking i will only need to configure a default route to make - correct?
please let me know if you need more information.
thanks in advance for your help!
jerry
dlongan is correct. This is an example:
interface Serial 0/0
ip address 50.x.x.x 255.255.255.252
interface Serial 0/1
ip address 50.x.x.y 255.255.255.252
ip route 0.0.0.0 0.0.0.0 50.x.x.w
ip route 0.0.0.0 0.0.0.0 50.x.x.z
interface Serial 0/0
ip address 50.x.x.x 255.255.255.252
interface Serial 0/1
ip address 50.x.x.y 255.255.255.252
ip route 0.0.0.0 0.0.0.0 50.x.x.w
ip route 0.0.0.0 0.0.0.0 50.x.x.z
ASKER
with some research of my own i found that you will need to configure a multilink interface then add the serial interfaces to the multilink group to setup two seperate T-1's to the Internet on the same router. i havent tested yet but i will post results when i do.
interface multilink1
ip address 50.x.x.x 255.255.255.252
no ip route-cache cef
no ip route-cache
no ip mroute-cache
no cdp enable
ppp multilink
ppp multilink group 1
interface Serial0/0/0:0
no ip address
encapsulation ppp
no ip route-cache cef
no ip route-cache
no fair-queue
no cdp enable
ppp multilink
ppp multilink group 1
!
interface Serial0/0/1:0
no ip address
encapsulation ppp
no ip route-cache cef
no ip route-cache
no fair-queue
no cdp enable
ppp multilink
ppp multilink group 1
ip route 0.0.0.0 0.0.0.0 XXX.XXX.XXX.XXX
interface multilink1
ip address 50.x.x.x 255.255.255.252
no ip route-cache cef
no ip route-cache
no ip mroute-cache
no cdp enable
ppp multilink
ppp multilink group 1
interface Serial0/0/0:0
no ip address
encapsulation ppp
no ip route-cache cef
no ip route-cache
no fair-queue
no cdp enable
ppp multilink
ppp multilink group 1
!
interface Serial0/0/1:0
no ip address
encapsulation ppp
no ip route-cache cef
no ip route-cache
no fair-queue
no cdp enable
ppp multilink
ppp multilink group 1
ip route 0.0.0.0 0.0.0.0 XXX.XXX.XXX.XXX
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I am not sure about load balancing with respect to a default route. I would best guess you will need to pick one or the other to be the outbound route. You could create two static default routes, but one should have a lower cost then the other.