[83052] in North American Network Operators' Group
Re: Traffic to our customer's address(126.0.0.0/8) seems blocked by packet filter
daemon@ATHENA.MIT.EDU (Joe Abley)
Wed Aug 3 16:23:40 2005
In-Reply-To: <17137.9670.169075.301170@giles.gnomon.org.uk>
Cc: mborba@trf3.gov.br, nanog@merit.edu
From: Joe Abley <jabley@isc.org>
Date: Wed, 3 Aug 2005 16:22:04 -0400
To: Roy Badami <roy@gnomon.org.uk>
Errors-To: owner-nanog@merit.edu
On 3 Aug 2005, at 16:15, Roy Badami wrote:
>
> Marlon> just remember that not all networks use '126.255.255.255'
> Marlon> as a broadcast address. there are non-broadcast networks
> Marlon> where that address is a 'host' one.
>
> Surely the only networks on which this can be a host are:
>
> one using a /7 or shorter netmask
> a /31 (as per RFC3021)
[root@felix]# ifconfig lo0 inet 126.255.255.255 netmask 255.255.255.255
alias
[root@felix]# ping 126.255.255.255
PING 126.255.255.255 (126.255.255.255): 56 data bytes
64 bytes from 126.255.255.255: icmp_seq=0 ttl=64 time=0.088 ms
64 bytes from 126.255.255.255: icmp_seq=1 ttl=64 time=0.062 ms
^C
--- 126.255.255.255 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.062/0.075/0.088/0.013 ms
[root@felix]#
Inserting the host route for 126.255.255.255/32 into an adjacent IGP is
similarly straightforward.
Joe
