Category: Cisco IOS
Anything related to Cisco IOS
Cisco IOS (XE) and OpenSSH 8.x
OpenSSH marches on and disables old and insecure algorithms. Sadly, Cisco IOS (XE) lags behind. Previously, I could do all scp operations from the cli in the switches. Now, I must do everything from the management station. For now, I can get by if I allow some of the older key exchange (key agreement) algorithms. […]
Read More → Cisco IOS (XE) and OpenSSH 8.xAdding a Cisco Catalyst 2960X switch to a Cisco Catalyst 2960S switch stack
A few things must be done before adding a Cisco Catalyst 2960X switch to a Cisco Catalyst 2960S switch stack. I assume you know your way around Cisco IOS, and already have the necessary hardware components.
Read More → Adding a Cisco Catalyst 2960X switch to a Cisco Catalyst 2960S switch stackRSA keys in Cisco switches and routers
See also Cisco Bug ID CSCuz72344.
Read More → RSA keys in Cisco switches and routersLogging messages from Cisco IOS 12.2(55)SE to an IPv6 enabled syslog host
While reloading a Cisco Catalyst 3560 running IOS 12.2(55)SE the other day, I noticed the switch stopped sending messages to the configured IPv6 enabled syslog host. Nothing appeared in the log files on the syslog host until I manually disabled and reenabled the log statement.
Read More → Logging messages from Cisco IOS 12.2(55)SE to an IPv6 enabled syslog host