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Multilink

Please in a simple way, how do you set up multilink and how is it different from using direct serial link?

Thanks

3 REPLIES

Re: Multilink

HI, [PLS RATE if HELPS]

Here is the sample Multi-Link Configuration.

interface Multilink1

description *****MULTILINK in France*****

ip address x.x.x.x

ppp multilink

ppp multilink group 1

!

!

interface Serial0/3/0

description **CIR 1**

bandwidth 2048

ip address x.x.x.x

encapsulation ppp

ppp multilink

ppp multilink group 1

!

interface Serial0/3/1

description **CIR 2**

bandwidth 2048

ip address x.x.x.x

encapsulation ppp

ppp multilink

ppp multilink group 1

!

interface Multilink1

description *****MULTILINK in US*****

ip address x.x.x.x

ppp multilink

ppp multilink group 1

!

!

interface Serial0/3/0

description **CIR 1**

bandwidth 2048

ip address x.x.x.x

encapsulation ppp

ppp multilink

ppp multilink group 1

!

interface Serial0/3/1

description **CIR 2**

bandwidth 2048

ip address x.x.x.x

encapsulation ppp

ppp multilink

ppp multilink group 1

!

Note: Multi Link PPP will load Balance by Default after the Setup. Assigning the IP Address to the Serial Interfaces is not mandatory since all the traffic is taken care by means of Multi Link Interface (logical interface configuration).

Failover will be maintained automatically by the ML-PPP. If one Link goes DOWN the second Link will take over the traffic unless and until both the links are member of the ML Bundle configuration.

Also, its quiet difficult to track whether both the links are up since we will have the reachability even with a single link (which is member of the Bundle).

Hope i am Informative.

PLS RATE if HELPS

Best Regards,

Guru Prasad R

Community Member

Re: Multilink

Thanks.

SO in your example, you have 2 multilinks on one router and they are both multilink1. Shouldn't the group number and multilink number change.

Again, I can give each interface multilink an ip address and make this the default gateway?

Does the ip address of the multilink have to be on the same range of the serial interfaces that makes it up?

Also, if we have serial 0/0 and we now do serial 0/0:0 and serial 0/0:1 which is in effect one serail line but with subinterfaces, is this still a multilink?

Thanks

Re: Multilink

HI,

Your Understanding is Wrong.

In my sample there is only ONE Multi-Link Interface Configured ie., Multilink1

Yes the IP-address of the MultiLink Interfaces at both the ends should be in the same Range.

Assigining the IP Address to the Serial Interfaces is not mandatory because the once the ML-PPP is Up the entire Communication will happen based on the Logical Multi-link Interface.

DO RATE all Helpful POSTS

Best Regards,

Guru Prasad R

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