Can Multilink PPP bridging?

[ben2001]

Is is possible to setup Multilink PPP (via multiple T1) and bridged them together? Anyone has an example of it.

Thank you

 

[JOAMON]

The correct term would be bonding them together and yes you can do it point to point with with two t1 lines or with two t1 lines to the internet so long as your ISP supports it.

Example:

ip cef

interface Multilink##
description Maple Street
ip address x.x.x.x 255.255.255.252
no ip directed-broadcast
no cdp enable
ppp multilink
ppp multilink fragment disable
multilink-group ##

interface Serial0/0
description
no ip address
no ip directed-broadcast
encapsulation ppp
no keepalive
tx-queue-limit 26
no fair-queue
no cdp enable
ppp multilink
multilink-group ##

interface Serial0/1
description
no ip address
no ip directed-broadcast
encapsulation ppp
no keepalive
tx-queue-limit 26
no fair-queue
no cdp enable
ppp multilink
multilink-group ##

May need to add nat, crypto, or access-list commands to the multilink if used for internet side.

 

[JOAMON]

If used point to point remember that one side should have both serial interfaces set to clock source internal for line clocking.

 

[ben2001]

I mean bridging not bonding. Instead of setup two subnet (one for each office), can I bridge them together (via multilink PPP) so the two offices are on the same subnet?

Thanks

 

[gwildfire]

I think what you are trying to do is transparent birdging. Anyway I ran the same thing at my last job which was a few years ago, but from what I remeber I found this which extends one subnet across a wan link. I assume to intergrate multilink add the solution above by joamon.


RouterA RouterB
-------- --------
Interface ethernet 0 Interface ethernet 0
bridge-group 1 bridge-group 1

Interface serial 0 Interface serial 0
bridge-group 1 bridge-group 1

bridge 1 protocol ieee bridge 1 protocol ieee



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[JOAMON]

Sorry....mis-understood what you were trying to do.
The bridge setup from gwildfire looks like what you were wanting. Would the following be another possibility.

Router A
Interface ethernet0
ip address 192.168.1.1 255.255.255.0
interface serial0
ip unnumbered ethernet0

Ronter B
interface ethernet0
ip address 192.168.1.2 255.255.255.0
interface serial0
ip unnumbered ethernet0

 

[KiscoKid]

Only thing I'd mention in addition to what's already been said is that it may be more appropriate to enable bridging on the multilink interface rather than the individual serials. Otherwise not all your serials in the multilink group won't be able to pass OSI traffic.

 

[KiscoKid]

Only thing I'd mention in addition to what's already been said is that it may be more appropriate to enable bridging on the multilink interface rather than the individual serials. Otherwise not all your serials in the multilink group won't be able to pass layer 2 traffic.

 

[ben2001]

I will have my T1s in by the end of nextweek. Will see if it will work. Thank you everyone for your help.