I currently have a 5509 backbone with MLS, using a trunk to a 7206 router to initiate routing between VLANS. I also have several other trunks to CAT 5000 and 2900 switches. ALL TRUNKS USE ISL.
Now I'm getting in CAT 4006s with SUP 2s and they only do 802.1q trunking. The technical sales contact says no problem. I can configure a trunk between the 5509 and CAT 4000 using 802.1q but my VTP domain info and VLANS don't show up. TAC support didn't find an answer.
Can I mix trunks or do I need to upgrade to SUP 3s on the 4000s and use ISL?
Is Cisco phasing out ISL? What's best for the future when I have 6500 backbone and 4000s in the closet? I will never have the need for implementing trunks with other vendor swtiches.
You can have ISL and dot1q trunks terminating on the same switch and you should not have any issues with it. ISL is not being phased out but it's just that some hardware does not support ISL and moreover dot1q is an IEEE standard
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...