Uploading new code to Brocade XMRs causes BFD to drop

Hmm, not very good. I’m uploading code to our XMRs in preparation for our core upgrade. All I’m doing is uploading the code to flash, not actually rebooting.

However, it causes BFD to flap, which then causes OSPF on the interface to drop. IP’s have been changed, and read this from the bottom up:

19:09:39:N:OSPF: nbr state changed, rid, nbr addr, nbr rid,
 state full
19:09:39:N:BFD: Session UP for on eth 2/1
19:09:28:N:BFD: Session DOWN for on eth 2/1 Reason:Neighbor Signaled Session Down
19:09:28:N:OSPF: nbr state changed, rid, nbr addr, nbr rid,
 state down
19:02:39:I:CLI CMD: "copy tftp lp lpfpga05200c.bin fpga-all all" from ssh client


Brocade/Foundry finally allows the use of /31 on NetIron

As of code version 5.2, I can now finally configure /31’s on my NetIrons. Took long enough!

ver V5.2.0cT163

[email protected]#sh run int eth 1/6
interface ethernet 1/6
 port-name "Testing fibre"
 ip ospf area 0
 ip ospf passive
 ip address

[email protected]#ping
Ping self done.

From my desktop:


Pinging with 32 bytes of data:
Reply from bytes=32 time=8ms TTL=62
Reply from bytes=32 time=7ms TTL=62
Reply from bytes=32 time=4ms TTL=62
Reply from bytes=32 time=5ms TTL=62

Ping statistics for
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 4ms, Maximum = 8ms, Average = 6ms

INE Mock lab exam scheduled

I wanted to do a few of the INE mock exams before I do the real lab. Unfortunately their timetables are absolutely PACKED.

I was able to get one for Tuesday the 20th of December. I’ve applied for the day off from work as it’s a proper full day exam. I’d like to do at least 2 more before I do the real lab.

Lab booked – Brussels 27 April 2012

I initially wanted it earlier, but thanks to changes at work I’ve simply had to push this out. It’s now booked for 27/04/2012.

The price on this date went up to $1500, plus 21% VAT. That’s a total cost of over $1800! MADNESS!!!

Don’t install Ubuntu 11.10, or perhaps even 11.04

I’ve been running Ubuntu 9.10 on my dynamips box for sometime and it’s worked perfectly with my 4 quad NICs.

Last week I stupidly decided to upgrade my distro to 11.10. All looked fine. Dynamips still worked and everything looked okay.

However I was having some problems. Whenever I had a emulated router runs tags on a port, it refused to properly speak to a trunked switch port. CDP still worked, but nothing else. After hours of troubleshooting I knew nothing was wrong with my configs. The only recent change was the install.

So I reinstalled 9.10, and not a single problem again.

This has nothing to do with MTU size, as a ping packet and an ARP packet have tiny payloads. I probably could’ve figured out what the problem was eventually, but it was eating into my study time. Reinstalling only took about 40 minutes and I was back in action.

You can find the 9.10 iso over here: http://old-releases.ubuntu.com/releases/9.10/

The only problem with reinstalling is that Ubuntu changed the order of all my NICs. As my dynamips .net file maps certain router ports to certain breakout ports it completely screwed this up. I spent another hour sorting them out. This is my NIC file attached. Don’t use this yourself as your environment will be different of course.

Moral of the story. If you have a working system, don’t mess with it as you’re just wasting valuable time!