the following scenario: LAN Switch X4510 with two SUP7E Supervisor Engines in redundant Mode (hot stdby, SSO) actual Firmware is V15.0 (1r) SG2 I plan an update to V15.0 (1r) SG10, newest Firmwareversion for the SUP7E
Question: It's possible to update without downtime (redundant Engines) direct to the newest Version or via a step to a lower version as SG10 maybe V15.0 (1r) SG5 or it is unpossible without downtime?
There is an option available that will help you minimize influence on the network, it is called ISSU.
"The Cisco Catalyst 4500E Series was designed for excellent nonstop communications with noninterrupted hardware switching. With Cisco IO XE Software, customers continue to reap the benefit of this best-in-class resiliency in various ways. ISSU allows you to upgrade or downgrade complete Cisco IOS Software images with minimal (less than 200 msec) to no disruption to the network when using a redundant Cisco Catalyst 4500E Series system with dual Supervisor Engines 7-E. Facilitating rapid, nondisruptive software upgrade for new line cards, new power supplies, new features, or bug fixes, ISSU offers continuous packet forwarding during the supervisor-engine switchover running different Cisco IOS Software releases."
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.