About carl_townshend

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 · 06-12-2026

Hi AllWe are installing CW9174i and E access points, these will be going into 9200 Mgig switches but the 802.11at 30w PoE models. I can see on the webpage for these that 30w will be fine but with reduced uplink speed or 2.4 downgraded to 2x2 etc.Have...

carl_townshend · 03-25-2026

Hi GuysProbably a common topic in todays networking, I am keen to see how people are tackling micro segmentation, particularly in OT networks.We already secure north south traffic via firewalls, but we want to go one step further and secure east west...

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

carl_townshend · 01-07-2026

Hi what is the reason it won’t work ?

Member Since	‎05-13-2005 03:24 PM
Date Last Visited	‎07-10-2026 04:06 AM
Posts	5,374
Total Helpful Votes Received	226

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Best design for TOR switching - zero downtime upgrades

Microsegmenation - using ACLs

Allen Bradley switches powered by IOS

Meraki CW9174i power requirements

OT Microsegmentation

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

Re: Swapping out a Fortigate with a Meraki MX