Erlang BGP daemon

Blog moved to blog.habets.pp.se

---

I'm writing a BGP daemon in Erlang. It can connect, parse update packets and announce routes.

I started up an old Cisco 2620 router and sent route announcement to it until it cried:

%SYS-2-MALLOCFAIL: Memory allocation of 65536 bytes failed from 0x8046F3C8,
Pool: Processor Free: 79840 Cause: Memory fragmentation
Alternate Pool: None Free: 0 Cause: No Alternate pool

-Process= "BGP Router", ipl= 0, pid= 84
-Traceback= 804733A4 804754C8 8046F3CC 80851CDC 8081C7D8 80832848 80832F3C 8
%BGP-5-ADJCHANGE: neighbor 172.16.x.x Down No memory

Muhahahaha!

The program:

git clone http://cvs.habets.pp.se/~marvin/git/eggpd.git

Update:
I flooded the 2620 again for a few minutes and then disconnected the peer. It stopped responding. Well almost. It answers to ping (17 % packet loss), and my existing telnet session seems to be working somewhat, although there is a delay of about 10 minutes between keystroke and something actually happening. The serial console is no better. A new telnet session I set up session only has a delay of a couple of seconds though.

I did get a "show process cpu history":

3333333333333333333333333333333333333333333333333333333333
4444443333344444666664444444444555555555544444666665555577
100
90
80
70
60
50
40
30 ******* *************** ***** *********
20 ************************************************************
10 ************************************************************
0....5....1....1....2....2....3....3....4....4....5....5....
0 5 0 5 0 5 0 5 0 5

But the cpu is not in use :-):

CPU utilization for five seconds: 0%/0%; one minute: 0%; five minutes: 2%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
86 6860 568 12077 0.87% 0.10% 0.06% 0 BGP Scanner
80 128 105 1219 0.07% 0.09% 0.02% 67 Virtual Exec
3 780 1716 454 0.00% 0.00% 0.00% 0 OSPF Hello
4 5336 865 6168 0.00% 0.06% 0.05% 0 Check heaps
5 0 6 0 0.00% 0.00% 0.00% 0 Pool Manager
2 12 1705 7 0.00% 0.00% 0.00% 0 Load Meter

Enough for tonight.