About carl_townshend

carl_townshend · 08-17-2026

Hi AllWe have a pair of 9606R switches with sup 1 cards running stackwise virtual, currently running 17.03.01, we want to upgrade them to 17.15.6.1.can we go straight to this version?2.Any caveats?3.Should we copy the new IOS to both the chassis firs...

carl_townshend · 08-11-2026

Hi AllIn the absence of any network management software, we want to upgrade lots of switches, but schedule them to be done out of hours, the plan is to copy the file to the switches then run the upgrade/reload out of hours.The fact you have to run th...

carl_townshend · 07-17-2026

Hi GuysWe currently use Cat9300 TOR switches for our servers in a stack, the servers that plug into them use LACP to both switches in the stack for redudancy.The issue we are having is that if we do software upgrades, both switches go offline, we nee...

carl_townshend · 07-10-2026

Hi AllWe are evaluating some microsegmentation products, they effectively use ACLs to enforce on each port, trustsec isnt possible as wee have lots of older switches.Has anyone successfully implemented third party segmentation products using Cisco sw...

carl_townshend · 07-07-2026

Hi GuysOur OT partner is installing Allen Bradley stratix switches powered by Cisco IOS, I have a few questions1.Do they run normal IOS-XE? anything different about them?2.Where would we get the software updates from?3.They are installing a fiber rin...

carl_townshend · 08-17-2026

Hi, I have found the below on the internet, is it valid?Upgrading a Cisco Catalyst 9606R with Supervisor 1 directly from 17.3.1 to 17.15.6 requires a two-step upgrade path. Because 17.3.1 is an older release train, jumping directly to 17.15.6 will fa...

carl_townshend · 06-12-2026

Thanks @Karsten Iwen good to know

carl_townshend · 03-25-2026

Hi, it used to be but we have switched that feature off, it would have created too many ACLs and the TCAM tables on the switches would not be sufficient from what I remember.I can see some other options, VACLS, PVLANs? I did also see a solution calle...

carl_townshend · 03-20-2026

Hi, I am just looking at options at the moment, I have seen issues in the past where the whole stack crashes, I know the stack master should fail to the other switch but I have seen it not work also, maybe in newer switches its more stable but I have...

carl_townshend · 02-25-2026

Hi,its not the MG Gateway I have question on, its more how does it apply DHCP to MX, from what I can see it reserves the 2nd/3rd IP of the subnets for the MX appliances

Member Since	‎05-13-2005 03:24 PM
Date Last Visited	‎08-17-2026 01:09 AM
Posts	5,377
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Upgrading 9606R with sup 1

Easiest way to upgrade switches out of hours - IOS-XE

Best design for TOR switching - zero downtime upgrades

Microsegmenation - using ACLs

Allen Bradley switches powered by IOS

Re: Upgrading 9606R with sup 1

Re: Meraki CW9174i power requirements

Re: OT Microsegmentation

Re: Port channel from server to 2 seperate Cat9k switches, ESI multiho

Re: MG gateway port forwarding and dhcp reservation for Meraki MX