{"id":109,"date":"2011-08-08T19:04:00","date_gmt":"2011-08-09T00:04:00","guid":{"rendered":"https:\/\/packitforwarding.com\/index.php\/2011\/08\/08\/catalyst-6509-e-vss-software-upgrade-gone-bad\/"},"modified":"2020-08-12T11:08:49","modified_gmt":"2020-08-12T16:08:49","slug":"catalyst-6509-e-vss-software-upgrade-gone-bad","status":"publish","type":"post","link":"https:\/\/packitforwarding.com\/index.php\/2011\/08\/08\/catalyst-6509-e-vss-software-upgrade-gone-bad\/","title":{"rendered":"Catalyst 6509-E VSS Software Upgrade Gone Bad"},"content":{"rendered":"\n

<\/p>\n\n\n\n

This post was originally published on my old blog showbrain.blogspot.com<\/p><\/blockquote>\n\n\n\n

My work network has a pair of Cisco Catalyst 6509-E chassis that are configured in a Virtual Switching System (VSS) to serve as the network core.  Last week we had a supervisor engine crash and were having some residual craziness with our CAM table.  TAC suggested a reboot and software upgrade so we scheduled one for Sunday afternoon.  <\/span><\/p>\n\n\n\n

Usually, a software upgrade on the 6509 is relatively painless, but this time it proved to be very painful.  The previous software load on the VSS pair was 12.2(33)SXI, but it was the modular version (keep this in mind it’s important).  The new software load suggested by TAC was 12.2(33)SXJ1 which as of SXJ is only offered in monolithic versions.<\/p>\n\n\n\n

Assuming that all was well with these two versions, I started down the path of doing an enhanced Fast Software Upgrade (eFSU) of my VSS pair using the ISSU commands as listed in the Catalyst 6500 Release 12.2SX Software Configuration Guide – Virtual Switching Systems (VSS)<\/a> on Cisco’s website. After issuing issue loadversion disk0:s72033-ipservicesk9_wan-mz.122-33.SXJ1.bin on the active console, I waited for the standby chassis to reload. Unfortunately, it entered a reboot loop because the new software was not compatible with ISSU. Here is where it got hairy. At this point, I could neither abort nor complete the upgrade on the active supervisor. It wouldn’t let me change the boot system variable because it had a state somewhere that said it was in an ISSU upgrade even after power cycling the chassis.<\/p>\n\n\n\n

After 5 hours on the phone with TAC, we were able to clear this persistence and finish the upgrade, but it was a very long downtime. The moral of the story\u2026 modular and monolithic IOS don’t mix well.<\/p>\n","protected":false},"excerpt":{"rendered":"

This post was originally published on my old blog showbrain.blogspot.com My work network has a pair of Cisco Catalyst 6509-E chassis that are configured in a Virtual Switching System (VSS) to serve as the network core.  Last week we had a supervisor engine crash and were having some residual craziness with our CAM table.  TAC 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If the chain is broken, the attack will fail. 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Each layer by itself is not secure, but together they provide a better security for the data being protected. These layers can be summarized as the following:\u2026","rel":"","context":"In "Blog"","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/ogres-layers.jpg?fit=1146%2C778&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/ogres-layers.jpg?fit=1146%2C778&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/ogres-layers.jpg?fit=1146%2C778&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/ogres-layers.jpg?fit=1146%2C778&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/ogres-layers.jpg?fit=1146%2C778&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":531,"url":"https:\/\/packitforwarding.com\/index.php\/2019\/03\/18\/ccna-cyberops-secfnd-objective-6-1\/","url_meta":{"origin":109,"position":4},"title":"CCNA CyberOps SECFND Objective 6.1","author":"Ben Story","date":"March 18, 2019","format":false,"excerpt":"Compare and contrast an attack surface and vulnerability.Implementing Cisco Cybersecurity Operations (210-255) The attack surface of a piece of hardware or software is the total of all potential attack vectors. An attack vector can be a service or other entry point. To be used in an attack there must be\u2026","rel":"","context":"In "Blog"","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"Photo by Pascal Renet from Pexels","src":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/architecture-building-castle-187854.jpg?fit=640%2C426&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/architecture-building-castle-187854.jpg?fit=640%2C426&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/architecture-building-castle-187854.jpg?fit=640%2C426&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":504,"url":"https:\/\/packitforwarding.com\/index.php\/2019\/03\/11\/ccna-cyberops-secfnd-objective-2-7\/","url_meta":{"origin":109,"position":5},"title":"CCNA CyberOps SECFND Objective 2.7","author":"Ben Story","date":"March 11, 2019","format":false,"excerpt":"Describe these concepts: Asset management, configuration management, mobile device management, patch management and vulnerability managementUnderstanding Cisco Cybersecurity Fundamentals (210-250) Asset Management Assets are the items of a company that need protected. To be able to protect them, they must be inventoried and managed. Policies should indicate how assets are used,\u2026","rel":"","context":"In "Blog"","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/posts\/109","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/comments?post=109"}],"version-history":[{"count":2,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/posts\/109\/revisions"}],"predecessor-version":[{"id":1212,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/posts\/109\/revisions\/1212"}],"wp:attachment":[{"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/media?parent=109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/categories?post=109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/tags?post=109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}