06-27-2012 01:42 PM - edited 03-04-2019 04:49 PM
All-
Our client wants to setup a new site with two WAN circuits to their MPLS. I am attaching the diagram with two options we want to implement. There are very heavy traffic for those two WAN circuits.
For the inbound traffic to the CPE router, customer wants to few hosts (e.g 20.20.20.0/28) to go thru the WAN1, and all other traffic will go thru WAN 2 link. If WAN 1 link goes down, ALL traffic will go thru the WAN2 link; If WAN 2 link goes down, ALL traffic will go thru the WAN1 link.
For the oubound trffic from the CPE router, customer wants the subnet 100.100.100.0/24 to go thru the WAN1 link, and all other traffic will go thru WAN2 link. If WAN 1 link goes down, ALL traffic will go thru the WAN 2 link; If WAN 2 link goes down, ALL traffic will go thru the WAN 1 link.
What are the pros and cons on Option1 and Option 2? The sample on how to configure on routing protocol BGP regarding of my scenario will be helpful.
Regards,
Joe
06-28-2012 06:05 AM
Any suggestion is greatly appreciated!
06-28-2012 10:14 AM
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Suggestion would be use both paths proportionally, and use QoS.
06-28-2012 02:18 PM
Thanks!. I am looking on the BGP routing configuration.
06-29-2012 12:57 AM
If you are using single CE with multiple PE, then use the below config to do load balancing
interface gi0/0
ip address 10.10.10.1 255.255.255.252
no ip route-cache
interface gi0/1
ip address 11.11.11.1 255.255.255.252
no ip route-cache
router bgp x
neighbor 10.10.10.2 remote-as 10
neighbor 10.10.10.2 route-map Set_MED_LAN1_Out
neighbor 11.11.11.2 remote-as 10
neighbor 11.11.11.2 route-map Set_MED_LAN2_Out
route-map Set_MED_LAN1_Out permit 10
match ip address 1
set med 100
route-map Set_MED_LAN1_Out permit 20
set med 200
route-map Set_MED_LAN2_Out permit 10
match ip address 2
set med 100
route-map Set_MED_LAN2_Out permit 20
set med 200
access-list 1 permit 100.100.100.0 0.0.0.255
access-list 2 permit 200.200.200.0 0.0.0.255
Thanks / Samy
06-29-2012 08:04 AM
Thanks Samy! Couple questions...1) I want to set up the inbound traffic control on the CPE router, let's say we only permit the subnet 30.30.30.0/24 to come in on WAN1 link, and the other traffic on WAN2 link, and if one of them goes down, the ALL traffic will go to the other link. 2) For the inbound traffic control, should the ISP need to configure anything on their end? 3) What is the difference to use "set med", " set orgin igp" and " set local preference"? in my case, which is the best fit?
06-29-2012 08:12 AM
Either you can use "MED" or AS_PATH.
Thanks / Samy
06-29-2012 08:32 AM
Samy, what's pros and cons to to have two router, and each one has one link? Thanks!
06-29-2012 08:36 AM
If you have one router with two links and the router fails, your network down.
If you use two router, and one router fails, you still have one router with one link.
Regards
Sent from Cisco Technical Support iPad App
06-29-2012 11:05 AM
Thanks Handoko, I still have two questions...
1) I want to set up the inbound traffic control on the CPE router, let's say we only permit the subnet 30.30.30.0/24 to come in on WAN1 link, and the other traffic on WAN2 link, and if one of them goes down, the ALL traffic will go to the other link. 2) For the inbound traffic control, should the ISP need to configure anything on their end?
06-29-2012 03:27 PM
You can manipulate inbound traffic by using community attribute to prepend as-path
Sent from Cisco Technical Support iPhone App
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