IOS Self-Signed Certificate Expiration on Jan. 1, 2020

At 00:00 on 1 Jan 2020 UTC, all Self-Signed Certificates (SSC) that were generated on IOS/IOS-XE systems will expire, unless the system was running a fixed version of IOS/IOS-XE when the SSC was generated.  After that time, unfixed IOS systems will be unable to generate new SSCs.  Any service that relies on these self-signed certificates … Read more

Troubleshooting a fiber optic link on Cisco switches

This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this content, you must be a member of Justin’s Patreon Unlock with PatreonAlready a qualifying Patreon … Read more

How does BGP select routes?

This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this content, you must be a member of Justin’s Patreon Unlock with PatreonAlready a qualifying Patreon … Read more

The new Cisco 9600

https://blog.noblinkyblinky.com/2019/04/29/introducing-the-catalyst-9600/ The Catalyst 9600 enters the market as the last piece of the CAT9K series puzzle. It compliments the rest of the line up, the CAT 9200, 9300, 9400, and 9500 series switches. And this is ultimately an upgrade to the 6500 and 6800 series Catalyst platforms.