Re: [LARTC] VRRPD (rfc2338)

[sabat <sabat@eloan.com>]

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Dmitry Golubev wrote:

>But as far as I know, there is no VRRP implementations that fully comply
>with rfc2338 as it requires multiple MAC addresses for the one poor linux
>box's interface. Maybe, someone can suggest a working solution of this
>problem?
>
Yes, there is a way -- the VLAN code in the linux kernel supports 
setting the MAC address of virtual interfaces (eth0.5, for instance). 
AFAIC, this is much superior (in concept) to multicast MACs, given the 
Cisco problem.

>
>I have seen one idea, but haven't tested it yet (hope someone can try it out):
>
>To bridge the physical iface with TAP on which the vrrpd (or keepalived) is
>running. In that case we could make the VRRP-router that fully comply with RFC.
>
>For more info see: http://www.math.leidenuniv.nl/pipermail/bridge/2002-June/002021.html
>
>BR, Dmitry
>
>======= At 2002-12-11, 03:56:00 you wrote: =======
>
>  
>
>>The daemon at http://www.keepalived.org/ is the VRRPd implementation 
>>that's supposed to be the best. It's actually part of the Linux Virtual 
>>Server project (layer 4 load balancer), but the author claims you should 
>>be able to use it as a pure VRRP daemon -- although when I've read the 
>>doc, I couldn't figure out how. (But don't be discouraged by my 
>>impatience. :) It's supposed to be the most mature and ready-for-production.
>>
>>There's also Jerome Etienne's reference implementation (don't have a 
>>URL, but it's easy to Google). However, I've heard from more than place 
>>that this is too proof-of-concept and perhaps not production-worthy. 
>>Here's a link to a paper about running VRRPd as the hotspare protocol 
>>for linux firewalls (uses Jerome Etienne's implementation): 
>>http://www.gnusec.com/resource/security/docs/HAFirewallLinux-VRRP.pdf.
>>
>>BTW, keep in mind that if you intend to use VRRP in an environment with 
>>Cisco routers, you'll need to do some work on them too. Cisco routers do 
>>not accept multicast MAC addresses as legit ARP replies by default. 
>>Unfortunately, the VRRP RFC and all implementations use multicast MACs. 
>>What that means is that you'll need to either 1) turn the switch on the 
>>Cisco routers that makes them accept multicast MAC ARP replies (good), 
>>or 2) put a static ARP entry in the Cisco routers for the VRRP multicast 
>>MACs (better).
>>
>>Hope that helps.
>>
>>-S
>>
>>
>>Anton Tinchev wrote:
>>
>>    
>>
>>>Can someone point me for good VRRPD (rfc2338) implementation on linux.
>>>Some stable and live project
>>>Thanks
>>>
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>>>
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>
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