PPP Multilink

msasikumar · ‎06-08-2010

HI All,

Can we bundle different bandwidth of link(one is 64Kb &other one is 256Kb) in Multilink interface ?

Hitesh Vinzoda · ‎06-08-2010

Hi,

You can bundle uneven bandwidth interface in multilink bundle. the total bandwidth of ML will be aggregate of bandwidth of interfaces.

256+64 = 320

interface Multilink1
 ip unnumbered Loopback0
 ppp multilink
 ppp multilink group 1
!
interface Serial1/4
 bandwidth 2000
 encapsulation ppp
 ppp multilink
 ppp multilink group 1
!
interface Serial1/5
 bandwidth 4000
 encapsulation ppp
 ppp multilink
 ppp multilink group 1
 serial restart-delay 0

… the bandwidth of the Multilink1 interface is 6000 kbps if both serial lines are up …

Rtr#show interface Multilink 1 | inc protocol|BW
Multilink1 is up, line protocol is up
  MTU 1500 bytes, BW 6000 Kbit, DLY 20000 usec,

… but drops to 4000 kbps when the Serial1/4 is disconnected:

%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/4, →
  changed state to down
Rtr#show interface Multilink 1 | inc protocol|BW
Multilink1 is up, line protocol is up
  MTU 1500 bytes, BW 4000 Kbit, DLY 20000 usec,

Read more: http://blog.ioshints.info/2008/09/multilink-bundles-have-varying.html

HTH

Hitesh Vinzoda

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