[LARTC] VRRPD (rfc2338)

[LARTC] VRRPD (rfc2338)

[Anton Tinchev]

Can someone point me for good VRRPD (rfc2338) implementation on linux.
Some stable and live project
Thanks

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Re: [LARTC] VRRPD (rfc2338)

[sabat]

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
>
>_______________________________________________
>LARTC mailing list / LARTC@mailman.ds9a.nl
>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>  
>

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http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

Re: [LARTC] VRRPD (rfc2338)

[sabat]

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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
>>>
>>>_______________________________________________
>>>LARTC mailing list / LARTC@mailman.ds9a.nl
>>>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>>> 
>>>
>>>      
>>>
>>_______________________________________________
>>LARTC mailing list / LARTC@mailman.ds9a.nl
>>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>>    
>>
>
>			
>
>
>
>_______________________________________________
>LARTC mailing list / LARTC@mailman.ds9a.nl
>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>  
>

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Re: [LARTC] VRRPD (rfc2338)

[sabat]

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Dmitry Golubev wrote:

>Hello,
>
>And then bridge these interfaces together? I do not want to use any king of
>switch simply to make the card respond for multiple MAC addrs. Moreover
>I have seen VLAN probems with some eth cards that cannot work with
>1504 byte packets
>
Well, any good switch (at least Cisco) has spanning tree on so that such 
a bridge loop would not actually happen. But no, I mean that only the 
'live' router would have this MAC address. Maybe I don't understand what 
you're saying, exactly, but multiple MACs are how things are done in 
VRRP anyway. It's just a matter of whether you want multicast MACs or not.

>
>Anyway, Alexandre claims VLAN solution hacky. Do You use it in production?
>
I don't use it in production yet -- I'm about to start testing -- but I 
got the idea from someone who does use it in production, and seems quite 
satisfied that it works well, hacky or not. :) Check out the Linux 
Virtual Router Project: http://www.cs.fiu.edu/~flynnj/work/virtrouter.html

>
>BR, Dmitry
>
>======= At 2002-12-12, 15:05:00 you wrote: =======
>
>  
>
>>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
>>>>>
>>>>>_______________________________________________
>>>>>LARTC mailing list / LARTC@mailman.ds9a.nl
>>>>>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>>>>>
>>>>>
>>>>>     
>>>>>
>>>>>          
>>>>>
>>>>_______________________________________________
>>>>LARTC mailing list / LARTC@mailman.ds9a.nl
>>>>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>>>>   
>>>>
>>>>        
>>>>
>>>			
>>>
>>>
>>>
>>>_______________________________________________
>>>LARTC mailing list / LARTC@mailman.ds9a.nl
>>>http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
>>> 
>>>
>>>      
>>>
>
>			
>
>
>  
>

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