Dell N3000 – Firmware upgrade breaks BGP

I have 2 stacks of Dell N3048 switches. I upgraded one of them on the weekend from 6.2.7.2 to 6.3.0.56 and found that two of my BGP sessions didn’t come up any more – after establishing and receiving the routes the BGP session would cease with this logged:

After enabling debug logging for BGP it didn’t […]

pfSense 2.3 – IPSEC + OpenBGPD Dropouts

A while ago I upgraded one of my pfSense servers to 2.3. After I left it running for a while I noticed all of my IPSEC tunnels dropped out and never re-established – restarting the IPSEC service didn’t fix it and the only way I could fix it was rebooting the server. After doing some […]

Juniper MX with MS-MIC-16G – IPSEC with PSK

These are the steps to set up IPSEC on a Juniper MX with the MS-MIC-16G (multiservices MIC) – these instructions are for an MX80 but will work with any of the MX family with the multiservices MIC. These instructions will set up a route based VPN – you can then run GRE tunnels over the […]

Juniper EX – LLDP Crash

I ran into an issue with LLDP on a virtual chassis of EX4200 switches. When enabling LLDP and LLDP-MED, the LLDP process would constantly crash and restart. Each time it crashes it was creating a core dump. In the messages log file I could see these errors:

The configuration I had was nothing special: […]

ExaBGP – BGP routing with health checks

ExaBGP is an excellent tool for playing around with BGP. It is feature rich, has an API and gives you the option to run scripts which can announce/withdraw routes. In my environment I use ExaBGP for certain services to ensure high availability (and load balancing using equal cost multipath, ECMP). To do this I wrote […]

Dell N3000 Series – RADIUS Auth Bug

I was setting up a couple of stacks of Dell N3048 switches recently and ran into a strange bug when getting authentication working with RADIUS. Both stacks of switches were running version 6.2.0.5 (latest as of writing). The general setup of the two stacks: Both stacks connected to each other About 10 VLAN’s setup. Each […]