I'm getting "bad hello packet from 10.1.1.23 received: bad netmask 255.255.255.0" even though there's really nothing wrong with this netmask (I'm using 10.1.1.0/24 and 10.2.2.0/24 for some testing). Is there any reason why ospf thinks this is a bad netmask? Should I just ignore it? Thanks! 'james -- James A. Crippen <james@unlambda.com> ,-./-. Anchorage, Alaska, Lambda Unlimited: Recursion 'R' Us | |/ | USA, 61.2069 N, 149.766 W, Y = \f.(\x.f(xx)) (\x.f(xx)) | |\ | Earth, Sol System, Y(F) = F(Y(F)) \_,-_/ Milky Way.
On Fri, 5 Jan 2001, James A. Crippen wrote:
I'm getting "bad hello packet from 10.1.1.23 received: bad netmask 255.255.255.0" even though there's really nothing wrong with this netmask (I'm using 10.1.1.0/24 and 10.2.2.0/24 for some testing).
Are you sure, that all interfaces connected to network 10.1.1.0/24 have the same netmask?
Is there any reason why ospf thinks this is a bad netmask? Should I just ignore it?
Probably 10.1.1.23 has a different netmask than the router running BIRD.
Thanks! 'james
Kind regards Feela
-- Ondrej Feela Filip
On Sat, 6 Jan 2001, Ondrej Feela Filip wrote:
On Fri, 5 Jan 2001, James A. Crippen wrote:
I'm getting "bad hello packet from 10.1.1.23 received: bad netmask 255.255.255.0" even though there's really nothing wrong with this netmask (I'm using 10.1.1.0/24 and 10.2.2.0/24 for some testing).
Are you sure, that all interfaces connected to network 10.1.1.0/24 have the same netmask?
Yes, see below.
Is there any reason why ospf thinks this is a bad netmask? Should I just ignore it?
Probably 10.1.1.23 has a different netmask than the router running BIRD.
Both are bird routers. They're both connected to an isolated network on one 100Mbps hub. The network looks like this: 10.2.2.0/24 -----+----- |10.2.2.23 B 10.1.1.23|10.10.10.23 10.1.1.0/24 ----------+--------+---------+------------ 10.10.10.0/24 10.1.1.42| |10.1.1.1 A C 12.17.190.232| |12.17.190.220 12.17.190.224/28 -----+--------+---------+------------ 12.17.190.208/28 12.17.190.225|12.17.190.209 D |12.17.190.161 | \|/ V The Internet (I apologize for the horrible ASCII art.) Basically 12.17.190.224/28 and 12.17.190.208/28 are subnets on the same ethernet segment. /D/ is the primary router between them, as well as the default gateway to the rest of the Internet. /A/ and /C/ are connected to this ethernet segment but on different subnets, /A/ on 12.17.190.224/28 and /C/ on 12.17.190.208/28. Neither /A/ nor /C/ communicate routing information to /D/, thus all the 10 networks are invisible to the Internet. Both /A/ and /C/ are connected to another ethernet segment which is also connected to /B/. /A/, /B/, and /C/ all have interfaces on 10.1.1.0/24. /B/ also has another interface on the same ethernet segment but on a different subnet, 10.10.10.0/24. This is just a stub so I can watch another route propagate. /B/ is connected to yet another segment, this having only the 10.2.2.0/24 subnet on it, and /B/ is the only connected router. BTW, /A/ does not run any routing protocols. It's my workstation which is connected to the two ethernet segments so I can see the network traffic. With that, I'm seeing the "Bad OSPF hello packet from 10.1.1.23
participants (2)
-
James A. Crippen -
Ondrej Feela Filip