Package: bird Version: 1.0.11-4 Hi, i am having an anycast scenario where the linux box announces a single host route via rip. The route should be withdrawn as soon as the service stops. I implemented this via the "direct" protocol and simply shutting the interface lo:1.
I can reliably let bird (and birdc) hang when ifup/ifdowning the
interface a bit.
Default etch kernel linux-image-2.6.18-4-486.
[EMAIL PROTECTED]:~# bird -d -D file
bird: Guessed router ID 192.168.220.69 according to interface eth0
bird: Filter <NULL> did not return accept nor reject. Make up your mind
bird: Filter <NULL> did not return accept nor reject. Make up your mind
bird: nl_get_reply: Ignoring out of sequence netlink packet (4671898b !=
4671898c)
That was the message when the interface came up. stracing bird
shows its hanging in "recvmsg". Backtrace seems a little bit
corrupt.
[EMAIL PROTECTED]:~# gdb --pid 23501
[...]
0xb7e8179c in recvmsg () from /lib/tls/libc.so.6
(gdb) bt
#0 0xb7e8179c in recvmsg () from /lib/tls/libc.so.6
#1 0x080787e9 in ?? ()
#2 0x00000005 in ?? ()
#3 0xbfda15b0 in ?? ()
#4 0x00000000 in ?? ()
Interface config when up:
lo:1 Link encap:Local Loopback
inet addr:10.0.250.99 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:16436 Metric:1
Here is my config:
filter anycast {
if net ~ 10.0.250.96/27 then accept;
else reject;
}
filter nodef {
if 0.0.0.0/0 ~ net then reject;
else accept;
}
# Export all anycasts learned from the network (failover will be quicker)
protocol kernel {
learn; # Learn all alien routes from the kernel
scan time 2; # Scan kernel routing table every 20 seconds
export filter anycast;
import none;
}
# Import only direct interfaces if they match anycast routes
protocol direct {
interface "lo";
import filter anycast;
}
protocol device {
scan time 2; # Scan interfaces every 10 seconds
}
# Import all routes (we see the pools in birds internals) but export
# only anycasts (otherwise we'll see defaults)
protocol rip localrip {
interface "*" { mode broadcast; };
honor neighbor;
authentication none;
import filter { if net.len > 20 then accept; };
export filter anycast;
}
Flo
--
Florian Lohoff [EMAIL PROTECTED] +49-171-2280134
Those who would give up a little freedom to get a little
security shall soon have neither - Benjamin Franklin
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