How I can aggregate tow serial interfaces

[ahmed_saleh]

How I can aggregate tow serial interfaces

S1/0 & 1/1

I need the commands

[Pari Thiagasundaram]

You can use the "multi-link ppp" command.

Here is more info on that:

http://www.cisco.com/en/US/tech/tk713/tk507/technologies_configuration_example09186a00800a3b85.shtml

If helps, please rate post.

[ahmed_saleh]

Ok thanks but I need to tell you my router have tow interfaces

S1/0 connected to ISP1

S1/1 connected to ISP2

ISP1 support us with 6MB

ISP2 support us with 8MB

I need to aggregate 6MB+8MB = 14 MB

And I have 1 ip in each Serial interface I can't use virtual template interface or Interface Dialer

Did you have anther solution?

[Giuseppe Larosa]

Hello Ahmed,

in this case I would suggest to use load-balancing at layer 3 but Bandwidths are different on the two links.

You should use FR subifs 4 on link 1 and 3 on link 2, then increase the maximum-paths to 7 on your routing protocol (if possible)

Otherwise you should use EIGRP with variance for unequal load-balancing but I don't think you are using it with your providers

I don't think you can aggregate them.

What routing protocol do you use with your two providers ?

Hope to help

Giuseppe

[ahmed_saleh]

Ok I will drown my network now and I will post it for you again

[ahmed_saleh]

Sorry I am running dynamips to share what I will do this is not a rally configuration

________________________________________________________________

Rack1R2(config-subif)#do show run int f 0/0.1

Building configuration...

Current configuration : 194 bytes

!

interface FastEthernet0/0.1

encapsulation dot1Q 10

ip address 192.168.1.2 255.255.255.0

no snmp trap link-status

standby 1 ip 192.168.1.254

standby 1 priority 150

standby 1 preempt

Rack1R4(config-subif)#do show run int e 0/0.1

Building configuration...

Current configuration : 147 bytes

!

interface Ethernet0/0.1

encapsulation dot1Q 10

ip address 192.168.1.4 255.255.255.0

no snmp trap link-status

standby 1 ip 192.168.1.254

1 then I will configure anther 2 vlan like these steps

2 I will configure NAT

3 it's the critical point for me aggregation the link in tow serial interface in eche router

4 if you have complete configuration please post it for me

[Giuseppe Larosa]

Hello Ahmed,

if you need to use NAT the best strategy is to use two pools one provided by ISP1 and one used by provider2.

At the routing level I would suggest to use the slower link as a backup.

hope to help

Giuseppe

[Giuseppe Larosa]

Hello Ahmed,

I think this link can be useful for your scenario

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a00808d2b72.shtml

Hope to help

Giuseppe

[ahmed_saleh]

please I need response about this configuration just I am use this to share what I will do in the network I am not share a task for study but I will make this configuration in real environment

[Giuseppe Larosa]

Hello Ahmed,

the most common option is multilink PPP

you can follow this example:

int ser1/0

no ip address

enc ppp

ppp multilink 1

int ser1/1

no ip address

enc ppp

ppp multilink 1

interface multilink1

enc ppp

ppp multilink 1

ip address x.x.x.1 255.255.255.252

the configuration needs to be replicated on the other side's router using x.x.x.2 as the ip address.

use the following link as a reference

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

Hope to help

Giuseppe