MPLS VPN - Single CPE, Dual MPLS PE : Destination based Load Sharing/Balancing

[vimal vikraman]

Dear All,

I have a network where my locations are connected over MPLS Backbone of an ISP.

I have a single Cisco 892 CPE router and 2 MPLS links from 2 separate ISP PE routers are terminating to the same CPE.

Now, I need to perform load sharing between the 2 links. 

However, the MPLS network is configured as Hub-Spoke with this current location configured as a Spoke location.

The HUB location has 2 sets of application and both on separate LAN subnets.

Is it possible to Load share the traffic for these 2 subnets over the 2 MPLS links, i.e. Traffic from this spoke location destined to Subnet-1 of HUB should take link-1 as path && Traffic from this spoke location destined to Subnet-2 of HUB should take link-2 as path.

How can be achieve failover along with this, and how would the return traffic be load shared/balanced. 

[David_Che]

Traffic from the spoke CPE to HUB, it is rather easy to achieve load sharing.

Whatever routing protocol between CPE and ISP, BGP or static,

You just need make SUBNET-1 learnt from ISP1 higher priority than from ISP2.

and make SUBNET-2 learnt from ISP2 higher priority than from ISP1.

However, in the direction from HUB to spoke, you need configure PBR to achieve your goal.

that is to say, traffic from SUBNET-1 to spoke go ISP1,  traffic from SUBNET-2 to spoke go ISP2.

To make failover happen quickly, you also need to congigure IP SLA to verify the primary connectivity, if failed, then switchover to the secondary. Regarding the configuration of IP SLA, You can refer the documentation at:

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/6_x/nx-os/IPSLA/configuration/guide/b_Cisco_Nexus_7000_Series_NX-OS_IP_SLAs_Configuration_Guide_rel_6-x/b_Cisco_Nexus_7000_Series_NX-OS_IP_SLAs_Configuration_Guide_rel_6-x_chapter_01000.html

HTH,

David

[vimal vikraman]

Thanks David for the reply

is there any other way to do it as the HUB router does not support PBR.