It’s been quite a while since my last post and I thought I would post this little snippet of information that I found while deploying the ASR platform into my employers network.
Checking RX and TX light levels on the Cisco ASR platform
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Author Archives: nickryce
Using VASI to exchange IGP routes between VRF’s
I attended the packet pushers party on Friday 17th and managed to have some of my questions answered during what was a great show.
The path to certification
Over the last few years I have made the transition at the company I work for, from Support Engineer to Network Engineer. In between this I became a Managed Services Engineer dealing with the configuration, installation and maintenance of Cisco 1800 series routers. During this time I decided I would use the knowledge gained in my day job to go on the certification trail. 4 months later I gained my CCNA accreditation and a thirst to obtain more understanding in networking in general.
fun with bi-directional forwarding (BFD)
So I was tasked to provide a failover mechanism for a customer with Juniper equipment without using OSPF.
With the L2 providers we use there is always a link from the CPE to the provider equipment and then it breaks out to their backbone. Now, this means that there could be a break in the provider network and the customer CPE would still see the link as up. We would then be blindly forwarding traffic into a black hole. Continue reading
Juniper as-path-expand with bgp communities
With working in an ISP enviroment I always find myself trying to automate or create process for others to follow so I don’t have to do the work 😉
I recently started to look at BGP communities and to see how I can apply them in day to day life. One of the applications that would make my life easier the bigger we grow is putting the onus onto the bgp transit customer to affect how we advertise/announce them to our upstreams, peers and customers. Continue reading
Junoshere. For the masses?
It is amazing how sleepy you feel when sitting in a relatively dark auditorium after a buffet lunch.
I sat through a presentation on Junosphere which looked fantastic and just what the community has been crying out for so we no longer require to use olive’s that we cannot get support for. Continue reading
How to recover Cisco IOS from rommon
Thought I would add this to my blog to help anyone that was in the same situation I had back in April. A big thanks to Richard Morrell ( @richardmorrell ) for this!
If you have a Cisco router which is unable to boot it’s IOS (flash image is corrupted, lost or wrong build), then you can boot the rommon and ask it to TFTP a replacement image across. It is preferable you have a working flash device in the router to save the flash image to, but you can just boot it straight from TFTP to memory if you’re desparate. Pre-requesits: Continue reading
Junos ipv6 import filter
I’m going to start off with some example import filters for BGP with IPv6. Mainly from several best practise docs I have found across the internet. Continue reading
Tail Drop dot Net 