Comments on: Cisco Virtual Switching Systems (VSS) http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/ Everything under the Cisco sun Mon, 06 Sep 2010 16:56:44 +0000 http://wordpress.org/?v=2.2.1 By: Juno http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/#comment-12490 Juno Mon, 12 Apr 2010 12:53:15 +0000 http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/#comment-12490 I have an operation 6509 chassis with a SUP 720 and WS-X6708-10GE module. I have just added a second 6509 with the same characteristics. My intention is to go with VSS. I added one link from the SUP and one link from the Module from both 6509. I am about to configure the vss but firstly i wanted to make sure that this setup is ok and working. If someone has some previous experience please post. I have an operation 6509 chassis with a SUP 720 and WS-X6708-10GE module. I have just added a second 6509 with the same characteristics. My intention is to go with VSS. I added one link from the SUP and one link from the Module from both 6509. I am about to configure the vss but firstly i wanted to make sure that this setup is ok and working. If someone has some previous experience please post.

]]> By: Jason http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/#comment-7776 Jason Thu, 20 Aug 2009 16:15:29 +0000 http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/#comment-7776 Quick question...can you run the VSL etherchannel over say 1 of the sup720 10GB ports, and one off of a 6708 10GB line card port. Thus essentially having 1 port off each sup module, and 1 off of each 6708 line card to make the VSL link? Thanks, Jason Quick question…can you run the VSL etherchannel over say 1 of the sup720 10GB ports, and one off of a 6708 10GB line card port. Thus essentially having 1 port off each sup module, and 1 off of each 6708 line card to make the VSL link?

Thanks,
Jason

]]> By: ted http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/#comment-4178 ted Tue, 28 Apr 2009 16:16:31 +0000 http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/#comment-4178 Jim, Thanks for sharing your experience. That sounds like a PAIN! If I ever add more links to the VSL bundle, I'll be sure their configs are correct! Did you ever open a case with Cisco to figure out their best practice for adding interfaces? Ted Jim,

Thanks for sharing your experience. That sounds like a PAIN!

If I ever add more links to the VSL bundle, I’ll be sure their configs are correct! Did you ever open a case with Cisco to figure out their best practice for adding interfaces?

Ted

]]> By: ted http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/#comment-4177 ted Tue, 28 Apr 2009 16:14:38 +0000 http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/#comment-4177 Mark, You're right, PAGP is not enough by itself (imho). I'm using Dual active fast hello packets along with PAGP. These two should be enough which is why I didn't go with IP BFD. I'm running 12.33SXI release. http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/vss.html#wp1115311 Ted Mark,

You’re right, PAGP is not enough by itself (imho). I’m using Dual active fast hello packets along with PAGP. These two should be enough which is why I didn’t go with IP BFD. I’m running 12.33SXI release.

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/vss.html#wp1115311

Ted

]]> By: Mark Combs http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/#comment-3731 Mark Combs Wed, 15 Apr 2009 21:24:08 +0000 http://shouldhavegonewithcisco.com/2009/03/09/cisco-virtual-switching-systems-vss/#comment-3731 Ted, Good article. One questions regarding VSS. We are running VSS throughout our enterprise. One question I had regarding dual-active detection and issue that I have seen. The third option that you did not mention is having an IP BFD link between the two switches in case the VSL links go down. This also allows you not to depend on any other switches outside your core especially since they might not support pagp. I have not been able to get the IP BFD link to work. I have the link configured and excluded from being shutdown in a dual active situation but one switch is suppose to start recovery mode and it doesnt. I might need a code upgrade but not sure. Im running 12.33 SXH3a. Any help or insight you could provide would be great. Thanks, Mark Combs Ted,

Good article. One questions regarding VSS. We are running VSS throughout our enterprise. One question I had regarding dual-active detection and issue that I have seen. The third option that you did not mention is having an IP BFD link between the two switches in case the VSL links go down. This also allows you not to depend on any other switches outside your core especially since they might not support pagp. I have not been able to get the IP BFD link to work. I have the link configured and excluded from being shutdown in a dual active situation but one switch is suppose to start recovery mode and it doesnt. I might need a code upgrade but not sure. Im running 12.33 SXH3a. Any help or insight you could provide would be great.

Thanks,
Mark Combs

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