topic Re: Backup path when MPLS fails. in Routing and SD-WAN

Backup path when MPLS fails.

SACHIN SHARMA — Tue, 05 Mar 2019 04:17:41 GMT

Hello All,

we are currently using IPVPN( sitetosite vpn) to connect to our client network in remote location and now we have migrated to new MPLS network but we like to retain our vpn connection as a backup link incase of MPLS network failure ,can someone suggest how this can be achieved with IPSLA.

Thanks in Advance.

Backup path when MPLS fails.

mfurnival — Tue, 25 Jun 2013 08:28:37 GMT

Hi,

Is there a particular reason you want to use IPSLA? Typically in this environment you would use HSRP / VRRP between your two routers with the MPLS as master under normal operation. Inbound routing would be controlled by dynamic routing protocols (BGP over the MPLS, something else such as RIP, EIGRP, OSPF over the VPN).

Re: Backup path when MPLS fails.

SACHIN SHARMA — Wed, 26 Jun 2013 00:57:12 GMT

mfurnival,

what if we have single router with dual backup links one for MPLS and the other for StoS VPN ?

Backup path when MPLS fails.

SACHIN SHARMA — Wed, 26 Jun 2013 01:00:36 GMT

Here IPVPN and MPLS are interchangable i mean to say S2S VPN.

Backup path when MPLS fails.

mfurnival — Wed, 26 Jun 2013 09:54:08 GMT

With a single router all that changes is that you don't need HSRP any more. You would just control inbound and outbound routing via the appropriate routing protocol. Again, the common way to do this is to run BGP on your MPLS connection and some other routing protocol over the VPN (EIGRP / OSPF etc.). If the BGP routes are present they will be favoured over the VPN learned routes.