Mutlilink PPP help.

Unanswered Question

Hello all,

I have two sight for internet traffic which are connected with two T1's. I configure them with multilink ppp so i should get a throughput of 3 Mbps correct? My snmp traffic graph is not showing a balanced load across the two T1's. Here are the router configs:

Router1:

interface Multilink1

ip address 69.X.X.X 255.255.255.252

no ip mroute-cache

no cdp enable

ppp multilink

multilink-group 1

!

interface FastEthernet0/0

ip address 69.X.X.X 255.255.255.252

no ip route-cache

no ip mroute-cache

speed auto

full-duplex

!

interface Serial0/0

no ip address

encapsulation ppp

no fair-queue

pulse-time 10

no cdp enable

ppp multilink

multilink-group 1

!

interface FastEthernet0/1

ip address 69.X.X.X 255.255.255.128

speed 100

full-duplex

!

interface Serial0/1

no ip address

encapsulation ppp

no fair-queue

pulse-time 10

ppp multilink

multilink-group 1

ip route 0.0.0.0 0.0.0.0 X.X.X.X

ip route 69.X.X.X 255.255.255.192 69.X.X.X

ip route 208.X.X.0 255.255.255.128 X.X.X.X

Router 2 (remote site):

!

controller T1 0/0

framing esf

clock source line primary

linecode b8zs

channel-group 0 timeslots 1-24 speed 64

!

controller T1 0/1

framing esf

clock source internal

linecode b8zs

channel-group 0 timeslots 1-24 speed 64

!

controller T1 1/0

shutdown

framing esf

clock source internal

linecode b8zs

channel-group 0 timeslots 1-24 speed 64

!

controller T1 1/1

shutdown

framing esf

clock source internal

linecode b8zs

channel-group 0 timeslots 1-24 speed 64

!

controller T1 1/2

shutdown

framing esf

clock source internal

linecode b8zs

channel-group 0 timeslots 1-24 speed 64

!

controller T1 1/3

shutdown

framing esf

clock source internal

linecode b8zs

channel-group 0 timeslots 1-24 speed 64

!

!

interface Multilink1

ip address 69.X.X.X 255.255.255.252

no ip mroute-cache

no cdp enable

ppp multilink

ppp multilink group 1

!

interface FastEthernet0/0

ip address 69.X.X.X 255.255.255.192

speed 10

half-duplex

!

interface Serial0/0:0

no ip address

encapsulation ppp

no fair-queue

pulse-time 10

ppp multilink

ppp multilink group 1

!

interface Serial0/1:0

no ip address

encapsulation ppp

no fair-queue

pulse-time 10

ppp multilink

ppp multilink group 1

!

interface Serial1/0:0

no ip address

shutdown

!

interface Serial1/1:0

no ip address

shutdown

!

interface Serial1/2:0

no ip address

shutdown

!

interface Serial1/3:0

no ip address

shutdown

ip route 0.0.0.0 0.0.0.0 69.X.X.X (Multilink IP address of router 1)

Can anyone tell me what I'm doing wrong?

Thanks,

I have this problem too.
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Amit Singh Wed, 03/14/2007 - 07:36

Hi,

MLPPP makes sure that there is an equal packet distribution acorss the links.

By default the router does per destination load-balancing on the interfaces. If you want to do per-packet load-balancing, you can disable fast switching on the serial interfaces by using "no ip route-cache".

If you have CEF enabled on the router, you can also use CEF to do that load-blancing per packet. under the interface use " ip cef load-balncing per-packet".

Try the above to options listed above and see if it helps.

-amit singh

Amit Singh Wed, 03/14/2007 - 07:56

"I am now seeing that the two circuits are balanced",Please tell us the configuration you did. You can check it only in the reporting graphs or under the serial interface using " show interface" command and should show you almost equal traffic pattern.

-amit singh

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