About andrew.butterworth

andrew.butterworth · 12-02-2025

I have an existing FPR1140 that is managed by FMC. All running 7.6.2. The FPR1140 has a 4-port Etherchannel with several sub-interfaces as well as some VTI tunnels. I need to add HA so a 2nd FPR1140 has been purchased and onboarded to FMC. To mak...

andrew.butterworth · 11-14-2025

Just doing some housekeeping in our small Cisco SD Access lab. Updated CatC to 2.3.7.10.70209.10, built a new ISE 3.5 VM and then started upgrading the 4 x C9300 switches and 1 x C9800 WLC to 17.8.1. CatC offered the images, sub-images (EWLC) and t...

andrew.butterworth · 09-25-2025

I have a Catalyst 3650 with a L3 interface connected to a C921-4P router that is terminating some RAVPN PPPoE sessions. The C921-4P is attempting to relay the DHCPv6 messages from the client to a Windows DHCPv6 server. I'm only using DHCPv6 for oth...

andrew.butterworth · 09-15-2025

I noticed Catalyst 3650/3850 IOS-XE 16.12.14 appeared on CCO a few days ago, however there are no release notes. I've searched on CCO and externally but I can't find anything. Anyone know what's new or what's fixed?

andrew.butterworth · 09-02-2025

I'm testing an Identity policy on an FTD that uses Active Authentication via LDAP. This works OK, but I can't seem to find any way to manually clear authenticated user sessions down. I can't find it in the FDM help now, but I am sure it said the us...

andrew.butterworth · 10-20-2025

I've changed the virtual-template 'ipv6 unnumbered loopback0' to 'ipv6 unnumbered vlan99' and the behaviour is the same. I've also upgraded the IOS to 15.9(3)M12 that was released a few weeks ago to address some vulnerabilities and the behaviour is ...

andrew.butterworth · 09-25-2025

c921-4p#sho ipv6 dhcp interface Virtual-Template10 is in relay mode Relay destinations: 2001:xxxx:xxxx:xxxx:192:168:102:25 2001:xxxx:xxxx:xxxx:192:168:102:25 via Vlan99 2001:xxxx:xxxx:xxxx:192:168:100:25 2001:xxxx:xxxx:xxxx:192:168:...

andrew.butterworth · 09-25-2025

IPv6 routing is working correctly within the network and I'm using OSPFv3. The C921-4P has a virtual-template interface and this is configured with the relay commands. The C3650 has two L3 interfaces (SVIs) where the traffic arrives and where it sh...

andrew.butterworth · 09-15-2025

Isn't it usually the other way around? Release notes 1st and then the software later?

andrew.butterworth · 09-02-2025

The IP to user mapping is obviously stored somewhere as the user is displayed in the FDM GUI under 'Monitoring, Users'. The AD username and IPv4 address are shown. I want to know how to display and clear this from the CLI as it isn't clearable from...

Member Since	‎06-20-2002 01:22 AM
Date Last Visited	‎12-08-2025 02:30 PM
Posts	1,553
Total Helpful Votes Received	974

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User Activity

FMC managed FPR1140, need to add HA, port-channel requirements

CatC C9300 SWIM failures

Catalyst 3650 IOS-XE 16.12.14 relayed DHCPv6 packets being dropped

Catalyst 3650/3850 IOS-XE 16.12.14 - no release notes?

View/Clear identity mappings on FTD

Re: Catalyst 3650 IOS-XE 16.12.14 relayed DHCPv6 packets being dropped

Re: Catalyst 3650 IOS-XE 16.12.14 relayed DHCPv6 packets being dropped

Re: Catalyst 3650 IOS-XE 16.12.14 relayed DHCPv6 packets being dropped

Re: Catalyst 3650/3850 IOS-XE 16.12.14 - no release notes?

Re: View/Clear identity mappings on FTD