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shuaib.khalid
Beginner

Traffic Segregation on two ISPs (Data MPLS) with Fail over

Hi All,

 

I have two ISPs providing Data MPLS connectivity terminated on two separate routers. I am running BGP with both ISPs for LAN advertisement and remote end routes. On the LAN I have four VLANs.

 

10 LAN Users

20 IP Phones

40 VC

100 Servers

 

Currently all VLAN subnets are being advertising with both ISPs via BGP, i have configured AS prepend and local preference on each site to control primary and secondary routes, hence fail over is also controlled by BGP.

 

This site is DR site and all servers deployed here are DR servers and they need replicate with Production servers situated at aggregation site.

 

I want to use ISP1 for server traffic (VLAN 100) and ISP 2 for other VLANs, i can advertise specific subnets to both ISPs but in this way fail over would not be controlled. I am pasting below BGP configuration of both router please suggest how to control fail over in this scenario.

 

**-GW-R1#show run | sec bgp

router bgp 64767

bgp log-neighbor-changes

network 172.16.5.0 mask 255.255.255.0 (LAN Users)

network 172.16.6.0 mask 255.255.255.0 (IP Phones)

  network 172.16.20.0 mask 255.255.255.0 (VC)

network 172.16.100.0 mask 255.255.255.0 (Servers)

network 192.168.1.204 mask 255.255.255.252 (ISP1 WAN)

neighbor 5.5.5.5 remote-as 64767 (Secondary Router Neighbor)

neighbor 5.5.5.5 update-source Loopback0

neighbor 5.5.5.5 next-hop-self

neighbor 5.5.5.5 soft-reconfiguration inbound

neighbor 5.5.5.5 route-map LP_SECONDARY_BGP_PREFIX_ROUTES_IN in

neighbor 5.5.5.5 route-map PREP_SECONDARY_ROUTER_BGP_PREFIX_ROUTES_OUT out

neighbor 192.168.1.205 remote-as 9541 (ISP1 Neighbor)

neighbor 192.168.1.205 soft-reconfiguration inbound

neighbor 192.168.1.205 route-map LP_CYBERNET_BGP_PREFIX_ROUTES_IN in

neighbor 192.168.1.205 route-map PREP_CYBERNET_BGP_PREFIX_ROUTES_OUT out

 

**-GW-R2#show run | sec bgp

router bgp 64767

bgp log-neighbor-changes

network 172.16.5.0 mask 255.255.255.0 (LAN Users)

network 172.16.6.0 mask 255.255.255.0 (IP Phones)

network 172.16.20.0 mask 255.255.255.0 (VC)

network 172.16.100.0 mask 255.255.255.0 (Servers)

neighbor 4.4.4.4 remote-as 64767 (Primary Router Neighbor)

neighbor 4.4.4.4 update-source Loopback0

neighbor 4.4.4.4 next-hop-self

neighbor 4.4.4.4 soft-reconfiguration inbound

neighbor 4.4.4.4 route-map LP_PRIMARY_BGP_PREFIX_ROUTES_IN in

neighbor 4.4.4.4 route-map PREP_PRIMARY_ROUTER_BGP_PREFIX_ROUTES_OUT out

neighbor 192.168.20.109 remote-as 55483 (ISP2 Neighbor)

neighbor 192.168.20.109 soft-reconfiguration inbound

neighbor 192.168.20.109 route-map LP_MPL_BGP_PREFIX_ROUTES_IN in

neighbor 192.168.20.109 route-map PREP_MPL_BGP_PREFIX_ROUTES_OUT out

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