About Rolf Fischer

Rolf Fischer · 05-09-2017

Hi all, I'm looking for something similar to the interface port-channel commands no mls qos channel-consistency (c6k/Sup720)no platform qos channel-consistency (c6k/Sup2T) for the c4500 platforms with supervisor engine 7. The problem I'm trying to so...

Rolf Fischer · 10-26-2015

Hi All, today I came across a behaviour of the route-map option in the OSPF default-information originate command I don't understand.I have this pretty simple setup:R1 Loop0: 1.1.1.1/32R1 Loop10: 10.10.10.10/32R1 Fa0/0: 192.168.12.1/24 R2 Loop0: 2....

Rolf Fischer · 11-08-2013

Hi,we have two LAN-Core switches (c6504, Sup 720 10G, 12.2(33)SXI9) at a main site and two c4500 at a remote site connected by a VPLS.This VPLS includes hardware encryption boxes which have 1-Gbps interfaces but depending on the traffic profile (part...

Rolf Fischer · 07-28-2013

Hi,I've been searching for this information but didn't find anything so far.Among other things, with RFC 2328 the way to determine the prefered path has been changed.However, per default Cisco IOS platforms still use the RFC 1583 mechanisms for compa...

Rolf Fischer · 07-12-2013

Hi,today we had a very strange incident on some dot1.x (MAB, host mode multi-auth) enabled switchports: After I deleted a not-used VLAN on the VTP server, dozens of users suddenly lost their LAN-connectivity.As access-switches we have many different...

Rolf Fischer · 03-09-2022

Did you use a IOS-XE device's built-in wireshark for the packet capture? I've seen a lot of times wrong VLAN tags when using it.The MAC addresses look anonymized - is this real hardware or a virtualized environment?

Rolf Fischer · 11-16-2021

Hello, you could use EOT (Enhanced Object Tracking) to track the route, e.g.:track 230 ip route 10.90.230.0/24 reachabilityNow you could trigger your EEM applets by syslog messages like%TRACKING-5-STATE: 230 ip route 10.90.230.0/24 reachability Up->D...

Rolf Fischer · 06-25-2021

Hello,you can use a regular expression for the pattern argument, e.g.:event cli pattern "conf[a-z]* t[a-z]*" enterThis is of course a very simple regular expression, it would also match things like "confxyz tabc". A regexp with syntax-check would be ...

Rolf Fischer · 09-21-2020

Hello,please try to change the global maximum for this interface first and then restrict on a per-vlan basis, e.g.:interface GigabitEthernet1/0/2switchport trunk native vlan 100switchport mode trunkswitchport port-security maximum 1024switchport port...

Rolf Fischer · 08-18-2020

Today I found this old post when I was troubleshooting a similar problem with a MAB client.In this particular case I was able to solve the problem by using the "forced" option of "clear authentication sessions mac". switch#show auth sessions interfac...

Member Since	‎04-19-2009 04:37 AM
Date Last Visited	‎02-10-2023 09:38 AM
Posts	1,168
Total Helpful Votes Received	1447

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Disable QoS consistency check on c4k/Sup7 Etherchannel

OSPF conditional default-route with route-map & iBGP routes

Rate-limiting a routed port on a Catalyst 6500

ASA: OSPF Path Selection RFC1583 or 2328?

c4500 Sup IV: Strange dot1X MAB malfunction after deleting VLAN

Re: Non Native VLAN 1 Trunk IEEE/SSTP BPDU

Re: EEM script for OSPF route tracking

Re: EEM BACK UP - Need to Update Config

Re: port-security for one vlan on trunk

Re: 3850 with ISE - 802.1x Pending Deletion