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Re: [rare-dev] RARE/freeRtr Multi-path on ipv6 static route


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  • From: mc36 <>
  • To: , Carmen Misa Moreira <>
  • Subject: Re: [rare-dev] RARE/freeRtr Multi-path on ipv6 static route
  • Date: Wed, 10 Nov 2021 12:06:08 +0100

hi,

it's a bit tricky, you have to set an id for them to appear different to
freerouter:

sid(cfg)#show config-differences
ipv4 route v2 1.1.1.1 255.255.255.255 1.2.3.4 id 1
ipv4 route v2 1.1.1.1 255.255.255.255 1.2.3.5 id 2

sid(cfg)#

and further have trickynesses, as the dataplane is not ecmp aware at the
moment,
so one will be programmed and the other left as backup, in the dataplane...
but, recursive routes through them will be hashed between them properly...

so for example if you'll have a bgp session to 1.1.1.1 in my example, and
you'll learn 100 consecutive networks from that peer, then the prefixes
will be programmed equally between the nexthops...

so as you can see, this is a field where some evolution is required,
as this solution is far from perfect for now... :)

regards,
cs



On 11/10/21 11:55, Carmen Misa Moreira wrote:
Hi all,

I would like to set two static routes like this:

     ipv6 route inet fc01:30:: ffff:ffff:ffff:ffff:: fc01:20::2
interface sdn1.20

     ipv6 route inet fc01:30:: ffff:ffff:ffff:ffff:: fc01:10::2
interface sdn1.10

In this way, for the same destination fc01:30:: there are two possible paths through fc01:20::2 or fc01:10::2 with the same metric and cost. The idea is to have load balance on both routes but my problem is that the second command overwrites the first command so I only have one static route on the switch. Maybe I need to enable ecmp or something like this

Thanks for your time,

Cheers,

Carmen Misa




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