From: oletu@inbox.lv
Date: Mon Jan 05 2004 - 12:46:16 GMT-3
172.16.111.x is on network 172.16.104.x based on 255.255.248.0 netmask.
256-248 = 8, so it increament of 8s and not 6 as you said ealier.
thanks
Godswill
----- Original Message -----
From: "Stephen Skinner" <stephen_ski@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Monday, January 05, 2004 6:12 AM
Subject: Re: Router blew a gasket
> If i may ....
>
>
> i don`t get it ...
>
> how can
>
> ip address 172.16.111.1 255.255.248.0
>
> have 172.16.104.x in it`s network ....248 mask will mean that every 6
there
> is a change of network ..
> i.e 6 12 18 ...meaning that with a /21 the first network is .108....
>
> or am i going stark raving bonkers !!!!
>
>
> >From: "John Underhill" <stepnwlf@magma.ca>
> >Reply-To: "John Underhill" <stepnwlf@magma.ca>
> >To: "Dmitry Volkov" <dmitry.volkov@rogers.com>, "'CXP Peter'"
> ><peter@cyscoexpert.com>, <groupstudy@cconlinelabs.com>
> >CC: <ccielab@groupstudy.com>
> >Subject: Re: Router blew a gasket
> >Date: Sun, 4 Jan 2004 15:14:36 -0500
> >
> >Got it.. think it's just 'study fatigue' on my part, or Seeing Anomalous
> >Route Syndrome..
> >Thanks
> > ----- Original Message -----
> > From: Dmitry Volkov
> > To: 'CXP Peter'
> > Cc: ccielab@groupstudy.com
> > Sent: Sunday, January 04, 2004 2:12 PM
> > Subject: RE: Router blew a gasket
> >
> >
> > Some comment inline:
> >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On
> > > Behalf Of CXP Peter
> > > Sent: Sunday, January 04, 2004 1:59 PM
> > > To: ccielab@groupstudy.com
> > > Subject: Re: Router blew a gasket
> > >
> > >
> > > IP address 172.16.111.1 255.255.248.0 happens to be on the
> > > 172.16.104.0/21
> > > subnet and you advertised some addresses from this subnet
> >
> > Network statement under OSPF doesn't advertise addresses it rather
> >specifies
> > what interface OSPF is running on
> > and OSPF will advertise actual network configured on this interface,
> >which
> > is /21 in this case.
> >
> > > with "network
> > > 172.16.111.0 0.0.0.7 area 11". So it is very normal to see
> > > this route being
> > > advertised in OSPF.
> > >
> > > _____________________________
> > > Peter
> > > #7247 (R&S, Security, SP)
> > > CyscoExpert Corp.
> > > 4433 W. Touhy Ave. Suite 410
> > > Lincolnwood, IL 60712
> > > Phone (847) 674-3392
> > > Toll Free (866) CyscoXP (297-2697)
> > > Fax (847) 674-2625
> > >
> > > ----- Original Message -----
> > > From: "John Underhill" <stepnwlf@magma.ca>
> > > To: <ccielab@groupstudy.com>
> > > Sent: Sunday, January 04, 2004 12:36 PM
> > > Subject: Router blew a gasket
> > >
> > >
> > > > I was looking through the routing tables and noticed a
> > > route I didn't
> > > > advertise. This is really strange, because it says loop0 is
> > > connected on
> > > this
> > > > box in the route table, and is advertising it into OSPF,
> > > but the loop0
> > > address
> > > > that is configured is not the same, (not even close), and I never
> > > advertised
> > > > this network in OSPF. Router has been rebooted and erased
> > > since the last
> > > > config, but it looks like it's keeping it in memory.. pretty
weird..
> > > >
> > > > 172.16.0.0/16 is variably subnetted, 9 subnets, 5 masks
> > > > C 172.16.134.0/24 is directly connected, Serial0.2
> > > > O IA 172.16.44.0/29 [110/65] via 172.16.134.4, 00:03:52,
> > > Serial0.2
> > > > O IA 172.16.22.0/27 [110/65] via 172.16.123.2, 00:03:52,
> > > Serial0.1
> > > > C 172.16.1.0/24 is directly connected, Serial1
> > > > C 172.16.123.0/24 is directly connected, Serial0.1
> > > > C 172.16.104.0/21 is directly connected, Loopback0
> > > <-- This one --
> > > > R1#
> > > > !
> > > > interface Loopback0
> > > > ip address 172.16.111.1 255.255.248.0
> > > > no ip directed-broadcast
> > > > no ip route-cache
> > > > ip ospf network point-to-point
> > > >
> > > > router ospf 110
> > > > area 111 virtual-link 172.16.134.4
> > > > network 172.16.111.0 0.0.0.7 area 11
> > > > network 172.16.123.0 0.0.0.255 area 0
> > > > network 172.16.134.0 0.0.0.255 area 111
> > > >
> > > > Routing table on another box shows the route..
> > > >
> > > > C 172.16.122.0/27 is directly connected, Loopback0
> > > > C 172.16.22.0/24 is directly connected, Dialer0
> > > > C 172.16.22.1/32 is directly connected, Dialer0
> > > > C 172.16.123.0/24 is directly connected, Serial0.1
> > > > O IA 172.16.104.0/21 [110/65] via 172.16.123.1,
> > > 00:01:58, Serial0.1
> > > > R2#
> > > >
> > > >
> > > ______________________________________________________________
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> >
> >
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