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Beginner

vrrp and multi-home isp with redundancy

we have two isp connections as of now, but now we want to implement vrrp with two cisco devices and also terminate isp links to individual ha routers. eg: isp a link to two cisco and isp b to two cisco routers. can someone explain how to achieve this scenario at the best way possible.

 

 

 

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1 ACCEPTED SOLUTION

Accepted Solutions
VIP Mentor

Re: vrrp and multi-home isp with redundancy

Hi
why use VRRP for that just use BGP and load balance through BGP over both circuits
You could use IP Sla to prob a route upstream if required but you could do this without VRRP and IP SLA and just use BGP , heres an example of exactly what im talking about in this document , use BGP to alter the traffic flows with its metrics , it has good flexibility

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13762-40.html#anc26

Load Sharing When Multihomed to Two ISPs Through Multiple Local Routers

Load balancing is not possible in a multihomed environment with two ISPs. BGP selects only the single best path to a destination among the BGP paths that are learned from different ASs, which makes load balancing impossible. But, load sharing is possible in such multihomed BGP networks. On the basis of predetermined policies, traffic flow is controlled with different BGP attributes.

This section discusses the multihoming configuration that has the most frequent use. The configuration shows how to achieve load sharin

View solution in original post

6 REPLIES 6
VIP Mentor

Re: vrrp and multi-home isp with redundancy

Hi is this what you mean below but with just 1 switch behind the routers as an example , both routers have an ISP connection and have fail over using VRRP ?

if it is check this link , you could also set up ip sla with tracking to  enhance the fail over  setup

 

http://www.mustbegeek.com/configure-vrrp-in-cisco-ios-router/

 

 

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    track object-number interface type number {line-protocol | ip routing}

4.    interface type number

5.    vrrp group ip ip-address

6.    vrrp group priority level

7.    vrrp group track object-number [decrement priority]

8.    end

9.    show track [object-number]

 

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp_fhrp/configuration/xe-3s/fhp-xe-3s-book/fhp-vrrp.html#GUID-A6F936CD-71DF-4407-A943-3BD35389049A

Beginner

Re: vrrp and multi-home isp with redundancy

Sir is there any way for my vrrp routers both be active/master and load balance traffic? How can i configure vrrp routers to know if bgp session towards its outbound interface is down and switch to another bgp session?

VIP Mentor

Re: vrrp and multi-home isp with redundancy

Hi
why use VRRP for that just use BGP and load balance through BGP over both circuits
You could use IP Sla to prob a route upstream if required but you could do this without VRRP and IP SLA and just use BGP , heres an example of exactly what im talking about in this document , use BGP to alter the traffic flows with its metrics , it has good flexibility

https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/13762-40.html#anc26

Load Sharing When Multihomed to Two ISPs Through Multiple Local Routers

Load balancing is not possible in a multihomed environment with two ISPs. BGP selects only the single best path to a destination among the BGP paths that are learned from different ASs, which makes load balancing impossible. But, load sharing is possible in such multihomed BGP networks. On the basis of predetermined policies, traffic flow is controlled with different BGP attributes.

This section discusses the multihoming configuration that has the most frequent use. The configuration shows how to achieve load sharin

View solution in original post

Beginner

Re: vrrp and multi-home isp with redundancy

hello, isn't vrrp necessary for ha for networks below my bgp routers?

VIP Mentor

Re: vrrp and multi-home isp with redundancy

Yes on the lan side use HA bit for circuit failover and load balancing use BGP , switch connected to each router running duals SVIs with VIP address for the end users gateway 

VIP Mentor

Re: vrrp and multi-home isp with redundancy

You could look at GLBP too which is active active on lan as FHRP
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