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Outbound Traffic Load Sharing

acharyr123
Level 3
Level 3

Hi,

I have 2 ISP (1=10Mbps, 2=2Mbps) terminated into 2 routers. Routers are terminated into 2 different sets of firewall & the firewall'are terminated into Core switches.

I want to achive traffic load sharing b/w these 2 ISP's in such a manner that a large part of the traffic goes via ISP1 & rest via ISP2. At any point of time if ISP1 has more latency then partial traffic will go via ISP2. If any of the link goes down, the entire load will he transferred to the other one.

Is this possible????

3 Replies 3

Joseph W. Doherty
Hall of Fame
Hall of Fame

It might be if your able to use OER or PfR.

Thanx for your reply..But can u plz provide me with some config script for the same..I am attaching the diagram also.

If your routers are running BGP, an OER config would look something like:

Border router only:

key chain key1

key 1

key-string somekey

oer border

local Loopback0

master x.x.x.x key-chain key1

Combined border/master router

key chain key1

key 1

key-string somekey

oer master

logging

!

border x.x.x.x key-chain key1

interface FastEthernet0/0 internal

interface Serial0/0 external

!

border x.x.x.x key-chain key1

interface FastEthernet0/0 internal

interface Serial0/0 external

!

learn

throughput

delay

periodic-interval 0

monitor-period 1

aggregation-type bgp

mode passive

mode route control

mode select-exit best

periodic 180

!

oer border

local Loopback0

master 10.1.127.251 key-chain key1

More information can be found:

http://www.cisco.com/en/US/docs/ios/oer/command/reference/oer_book.html

http://www.cisco.com/en/US/docs/ios/oer/configuration/guide/oer-trf_rte_ctl.html

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