Use two serials wan interfaces as one

[edwarelsayegh]

Hi all,

I have 1841 router with 2 serial Wan interfaces each one is 2 Mbps

i want to configure them to use all of 4 Mbps

How to Configure them

Thanks

[cadet alain]

Hi,

http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/mlppp_over_serial.html

Regards.

Alain.

Don't forget to rate helpful posts.

[edwarelsayegh]

this my serials interfaces configurations

Serial Config :

interface Serial0/0/0

no ip address

encapsulation frame-relay IETF

no shutdown

frame-relay lmi-type q933a

!

interface Serial0/0/0.16 point-to-point

ip address x.x.x.x 255.255.255.252

frame-relay interface-dlci 16

[cadet alain]

Hi,

I only see one physical serial interface here, where's the other ?

For frame-relay, you'll have to use PPPoFR and then MPPP.

http://www.cisco.com/en/US/docs/ios/12_0t/12_0t1/feature/guide/pppframe.html

Regards.

Alain.

Don't forget to rate helpful posts.

[smehrnia]

Hello Ed,

There is a few steps you have to take to create a multilink over frame relay.

first you have to create a QoS policy map for the queueing purposes (required) ! multilink use FIFO by default.

then you have to associate a virtual template to your frame relay VC dlci .

assign your virtual template (which is bound to the frame relay VC) to a multilink interface and configure the ML int.

I put a sample config with regards to the information you provided here (I do the least required config):

service-policy FRAME

  class class-default

    fair-queue

int virtual-temp 1

no ip add

ppp multilink

ppp multi group 1

int s0/0/0.16

frame-r interface-dlci 16 ppp virtual-temp 1

int multilink 1

ip add x.x.x.x 255.255.255.252

ppp multilink

ppp multilink group 1

bandwidth X  ...................(optional)

service-policy out FRAME

end

!

show ppp multilink ...... (to verify)

plz Rate if it helped,

Soroush.

[John Blakley]

In addition to what everyone else has already stated, you also need to be configured on the other side to support MLP. You can't just bond it on your side and get it to transmit traffic at a higher rate if the other side doesn't support it. If these are P2P links that you control, you'll need to configure the other side for MLP as well. If it's a provider based service, you'll need to contact them and have them support your MLP connection.

HTH,

John

[Giuseppe Larosa]

Hello Ed,

keeping in mind what John has noted another possible option is to use multilink FR FRF.16 to avoid PPP+FR overhead

see

http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fs_mfr.html

Again it has to be supported and configured on both sides

Hope to help

Giuseppe

[edwarelsayegh]

i can only configure one side because the other side is the ISP

what about load sharing per packet is it good ???

[Giuseppe Larosa]

Hello Ed,

load balancing per packet is not recommended as it can cause out of order issues by sending packets of the same flow (same IP source address same IP destination address)  over different paths with slightly different delays.

You can use both links in Equal cost multi path using flow based load balancing and you should achieve load sharing on the links. This is the default and allows to avoid out of order issues.

To use any form of link aggregation you would need cooperation of the ISP as stated before

Hope to help

Giuseppe