[j-nsp] vrrp groups

[Harry Reynolds]

I think it depends on re type, and OS version, and some changes have been made to alter default intervals and to push vrrp into the pfe (distributed ppmd) to insulate it from RE cpu spikes. Generally speaking, the faster the interval and the slower the RE, the fewer groups before you hit issues. 

AFAIK, the we can do 255 groups per IFL and up to 1024 per IFD/system, with sufficiently long timers and a fast enough RE. Note that while you can assign the same group number to multiple ifls on the same IFD best practice is not to as this can cause some issues with learning bridges as noted below, each group shares the same v-mac.

Regards



 

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Chris Kawchuk
Sent: Monday, September 28, 2009 3:43 PM
To: luis barrios
Cc: juniper-nsp
Subject: Re: [j-nsp] vrrp groups

Hi.

255 Groups. It's not a Limit on the M10i, it's how VRRP works.

VRRP creates a Virtual-MAC-Address to use as the MAC<>IP for the VRRP address (i.e. the MAC address that's returned when a device ARP's for the address)

The "GroupID" in the VRRP config is used as the least-significant byte on the MAC.... Hence values of 0x00-0xFF (0 to 255) only.

Someone correct me here if i'm grossly mistaken.

Regards,

- Chris.




On 2009-09-28, at 4:22 PM, luis barrios wrote:

> Hello .. Does anybody know how many vrrp groups can i config in a m10i 
> router.
> Propably i will have 300 vlans in one interface in a router , and i 
> need to configure vrrp group too.  One vrrp group for each vlan.
> But i need to know the performance in this part of my juniper m10i.
>
> thanks
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net 
> https://puck.nether.net/mailman/listinfo/juniper-nsp

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