Hi All,
I hope this isn't something I've got wrong again, but I've been
comparing interface aliases between 2.0.32 and 2.2.0-pre7 and
aliased interfaces don't appear in /proc/net/dev in 2.2.0-pre7.
Because of this (I believe) 'ifconfig' doesn't report aliased
interfaces as being active:
ie:
# ifconfig eth0:1 192.168.1.1 up
# ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: icmp_seq=0 ttl=255 time=0.2 ms
64 bytes from 192.168.1.1: icmp_seq=1 ttl=255 time=0.1 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=255 time=0.1 ms
....
# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:3924 Metric:1
RX packets:64 errors:0 dropped:0 overruns:0 frame:0
TX packets:64 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
eth0 Link encap:Ethernet HWaddr 00:80:AD:B6:5D:E8
inet addr:192.168.2.3 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7569 errors:0 dropped:0 overruns:0 frame:0
TX packets:7710 errors:0 dropped:0 overruns:0 carrier:0
collisions:0
Interrupt:11 Base address:0x6500
# cat /proc/net/dev
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets
errs drop fifo colls carrier compressed
lo: 6538 70 0 0 0 0 0 0 6538 70
0 0 0 0 0 0
eth0: 719869 7740 0 0 0 0 0 63 1086253 7784
0 0 0 0 0 0
#
I don't know of any other way to determine if an interface/ip
address pair is active.
-Greg
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