I have been meaning to put this one up for a while now, the end of April has reminded me of the April fools RFCs. Yes it is a bit sad to look forward to the April fool RFC – my favourite might well be the IP over Avian Carrier ones. I do think it is worth putting this one up again, especially on the …

During some recent work we discovered a very interesting bug with Cisco 6500 and specifically their WS-X6708-10GE and WS-X6716-10GE cards. When installing the cards into 6509 or 6513 chassis it can cause an existing module to reload so if you happen to have chosen slot 9-13 you have a issue. The 8th …

The other week I can across a very useful command after we had a failure to one of our Sup720 cards is a 6509’s. The card was replaced but during the boot-up it would keep on dropping back to ROMMON, however when you type ‘boot’ it would load as expected. When I was asked to have a look my immediate …

I have been hitting a bug with the version of code we are running on our Cisco SSLM which is holding up a project rollout, as a result TAC have provided a version that it is fix on. I decided to give it a whirl in the test lab however spent a rather long time trying to work out how you upgrade the …

A little while ago I can across an issue where connectivity from a customers site back to our data centre was lost. We had 2 routers on their site set up as a HSRP pair, the issue was that the primary routers circuit was having an issue which resulted in us loosing connectivity. As HSRP was …

I have recently been doing a fair bit of work on some DNS/DHCP appliances that are based on a version of RHEL, as a result I have started to use the Bash shell alot more. In the past on Solaris and HP-UX I have resorted to using KSH and had configured my .profile to pretty much work how I needed. …