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 126.96.36.199, nbr addr 188.8.131.52, nbr rid 184.108.40.206,
19:09:39:N:BFD: Session UP for 220.127.116.11 on eth 2/1
19:09:28:N:BFD: Session DOWN for 18.104.22.168 on eth 2/1 Reason:Neighbor Signaled Session Down
19:09:28:N:OSPF: nbr state changed, rid 22.214.171.124, nbr addr 126.96.36.199, nbr rid 188.8.131.52,
19:02:39:I:CLI CMD: "copy tftp lp 10.1.1.1 lpfpga05200c.bin fpga-all all" from ssh client 10.1.1.1
As of code version 5.2, I can now finally configure /31′s on my NetIrons. Took long enough!
SSH@XMR4#sh run int eth 1/6
interface ethernet 1/6
port-name "Testing fibre"
ip ospf area 0
ip ospf passive
ip address 10.0.0.0/31
Ping self done.
From my desktop:
Pinging 10.0.0.0 with 32 bytes of data:
Reply from 10.0.0.0: bytes=32 time=8ms TTL=62
Reply from 10.0.0.0: bytes=32 time=7ms TTL=62
Reply from 10.0.0.0: bytes=32 time=4ms TTL=62
Reply from 10.0.0.0: bytes=32 time=5ms TTL=62
Ping statistics for 10.0.0.0:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 4ms, Maximum = 8ms, Average = 6ms
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.
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!!!
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!