If I recall correctly, we have over 500 mroutes. I was just speaking to a Cisco engineer that works with us about this. I think I'm going to save this change until last. We have a lot of etherchannels and we want to convert those to routed links with ECMP first, then we'll switch over to egress replication. It sounds like we shouldn't have more than a couple of seconds of impact.
Thanks! John On Tue, Sep 21, 2010 at 12:46 PM, Tim Stevenson <[email protected]> wrote: > Hi John, > Switching replication modes basically purges the hardware of all mroutes and > those will be reprogrammed based on the current software state. It will be > potentially disruptive for all mroutes, but the exact amount of traffic > loss/blackholing would depend on the rate of each stream at the time, and > the overall amount of time it takes to reprogram. For a few 100 mroutes, I > would not expect much impact. > > Hope that helps, > Tim > > At 11:30 AM 9/21/2010, John Neiberger averred: > >> We're running 12.2(33)SRC2, I believe. It's actually experimental code >> and the exact version is overwritten with another code. >> >> On Tue, Sep 21, 2010 at 12:04 PM, Jeffrey Pazahanick <[email protected]> >> wrote: >> > John, >> > Having switched back and forth a few times, I never noticed more than >> > a 1-2 second outage. >> > What version of code are you on? >> > >> > On Tue, Sep 21, 2010 at 11:59 AM, John Neiberger <[email protected]> >> > wrote: >> >> We're going to be doing a whole bunch of maintenance tonight during a >> >> maintenance window. One of the many things on our plate is to switch >> >> from ingress replication mode to egress on some 7600s that have a few >> >> hundred multicast routes on them. We know there is going to be at >> >> least a minor blip while things settle down after making the change, >> >> but I wanted to see if anyone on the list has done this and what the >> >> operational impact was. I've heard there will be slight interruption >> >> in traffic, but what sort of interruption are we talking about? Are we >> >> speaking about a second or two? >> >> >> >> I'm asking because we're trying to decide if we want to split this out >> >> to another night. If the disruption is minor and the risk is low then >> >> we'll do it tonight. Otherwise, we might choose to do it on a separate >> >> night. >> >> >> >> Any thoughts? >> >> _______________________________________________ >> >> cisco-nsp mailing list [email protected] >> >> >> >> <https://puck.nether.net/mailman/listinfo/cisco-nsp>https://puck.nether.net/mailman/listinfo/cisco-nsp >> >> archive at >> >> <http://puck.nether.net/pipermail/cisco-nsp/>http://puck.nether.net/pipermail/cisco-nsp/ >> >> >> > >> >> _______________________________________________ >> cisco-nsp mailing list [email protected] >> >> <https://puck.nether.net/mailman/listinfo/cisco-nsp>https://puck.nether.net/mailman/listinfo/cisco-nsp >> archive at >> <http://puck.nether.net/pipermail/cisco-nsp/>http://puck.nether.net/pipermail/cisco-nsp/ > > > > > Tim Stevenson, [email protected] > Routing & Switching CCIE #5561 > Distinguished Technical Marketing Engineer, Cisco Nexus 7000 > Cisco - http://www.cisco.com > IP Phone: 408-526-6759 > ******************************************************** > The contents of this message may be *Cisco Confidential* > and are intended for the specified recipients only. > > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
