there is indeed ISSU for VSS, even with single supervisor models. i recently upgraded from sxi2a to sxi6 with no noticeable impact if you do it right. that said, you do lose 50% of your cluster capacity. so i guess it depends on your interpretation/requirement for ISSU ;-)
on the flip, i can attest that sometimes ISSU doesn't work for various reasons, with no log entries to help give a clue. sometimes it's easier scheduling a 10-15 minute outage and just hitting the whole VSS than it is mucking with ISSU. On Sat, Jun 18, 2011 at 11:26 AM, scott owens <[email protected]> wrote: >> >> 8. Re: VSS - Horror stories, show-stoppers, other personal >> experience? (Tony Varriale) >> > > I am pretty sure Tony that when I took the VSS class at Networkers last June > in Las Vegas one of the benefits of the SXI4 code was that with dual sups > ... you got ISSU. > > I am so sure of it because that is what we did in the class ( it was held > the day before Networkers started ). > > From > http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/vss.html > > Quad-supervisor uplink forwarding provides these key features: > •eFSU upgrades— You can upgrade or downgrade your VSS system using ISSU. > See "Upgrading a VSS" > section<http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/vss.html#wp1169328> > for > more information about eFSU upgrades. > > scott > > >> Message: 8 >> Date: Fri, 17 Jun 2011 22:32:06 -0500 >> From: Tony Varriale <[email protected]> >> To: [email protected] >> Subject: Re: [c-nsp] VSS - Horror stories, show-stoppers, other >> personal experience? >> Message-ID: <[email protected]> >> Content-Type: text/plain; charset=ISO-8859-1; format=flowed >> >> On 6/17/2011 1:51 PM, Murphy, William wrote: >> > We are running VSS for distribution layer switching in a campus >> environment >> > and have been quite pleased with it... Benefits for us are >> simplification, >> > faster convergence and better performance (distribution of traffic)... >> No >> > more STP blocking ports, MCE to access-layer so both links are utilized, >> > faster convergence, no need for HSRP, also our two 10G uplinks are >> > equal-cost even though they are connected to separate chassis... It's >> > worked quite well except for ISSU... We have attempted using ISSU to do >> > hitless IOS upgrades with maybe 20% success rate... >> > >> There is no ISSU on the 6500 platform and never will be. >> >> tv >> >> >> ------------------------------ >> >> _______________________________________________ >> cisco-nsp mailing list >> [email protected] >> https://puck.nether.net/mailman/listinfo/cisco-nsp >> >> End of cisco-nsp Digest, Vol 103, Issue 52 >> ****************************************** >> > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
