jeff.cleverley at avagotech
Aug 1, 2012, 2:47 PM
Post #6 of 9
I do have a case that has been open for ~1 week, but haven't heard
much back yet. It is being escalated so hopefully I'll hear something
in the next few days.
On Wed, Aug 1, 2012 at 3:43 PM, Steiner, Jeffrey
<Jeffrey.Steiner [at] netapp> wrote:
> Unfortunately, I'm not sure what's going to happen with an LACP VIF that is inactive. I would have thought that just the LACP datagrams would be present, but I don't know for sure. I'll ask around, but you'll probably get a quicker response with a support case posing that question.
> -----Original Message-----
> From: Jeff Cleverley [mailto:jeff.cleverley [at] avagotech]
> Sent: Wednesday, August 01, 2012 10:20 AM
> To: Steiner, Jeffrey
> Cc: toasters [at] teaparty
> Subject: Re: Arp broadcasts from single vifs
> Thanks for the clarification. If I did this with a 10gig in one and multiple 1gig lines in another with priority to the 10gig, will all the 1gig lines still do the broadcast? I thought I saw a BURT about them only checking at start up, but that also caused some lack of failover because they were not aware the primary wasn't serving data.
> On Wed, Aug 1, 2012 at 3:47 AM, Steiner, Jeffrey <Jeffrey.Steiner [at] netapp> wrote:
>> You can use LACP. This is a commonly misread part of the documentation, which states you can't use LACP groups "AS" second-level interface groups, but you can use them "IN" a second-level interface group. The intent of the documentation was to say that you can't take a pair of LACP ifgrps and combine them into another LACP ifgrp and then have some sort of giant LACP trunk where some bits are active and some aren't. There's no problem with making something like a 4-port LACP to one switch, another 4-port LACP trunk to another switch, and then combining them together as an active-passive second-level ifgrp.
>> -----Original Message-----
>> From: toasters-bounces [at] teaparty
>> [mailto:toasters-bounces [at] teaparty] On Behalf Of Jeff Cleverley
>> Sent: Tuesday, July 31, 2012 6:32 PM
>> To: toasters [at] teaparty
>> Subject: Arp broadcasts from single vifs
>> I thought I posted about this a while back but don't seem to be able to find anything in my email or web searches. My apologies if this is a duplicate.
>> We have some 126.96.36.199P4 filers running static multimode vifs, combined into a second level single vif for failover. One vif has 4 or 6 1gig links, and the other is a 10gig network port. We use the prefer to run the 10gig as the primary. All this seems to work fine and pulling cables, etc fails over properly.
>> My question is whether there is another way to set up a failover configuration where the inactive links are not broadcasting the "who has xxx" arp requests every 5-6 seconds? With 20 standby links, this generates ~345K broadcast per day. This is causing arpwatch to create a very large file and be moderately useless due to the noise. We do have switches that could do LACP/dynamic multimode, but the network guide says these cannot be put in a second level vif.
>> Is there anything we can do to get failover vifs and not have all the chatter?
>> Jeff Cleverley
>> Unix Systems Administrator
>> 4380 Ziegler Road
>> Fort Collins, Colorado 80525
>> Toasters mailing list
>> Toasters [at] teaparty
> Jeff Cleverley
> Unix Systems Administrator
> 4380 Ziegler Road
> Fort Collins, Colorado 80525
Unix Systems Administrator
4380 Ziegler Road
Fort Collins, Colorado 80525
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