Here's a link which might be of use... It describes split horizon which
means a router will not advertise a route back out the same interface that
it was learned from. Poison reverse is similar except it WILL advertise the
route as unreachable back through the same interface it was learned from (as
opposed to not advertising it).
http://www.cisco.com/warp/public/779/smbiz/service/knowledge/wan/subifs.htm
Dennis
""John Neiberger"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Split Horizon with Poison Reverse in OSPF? Could you elaborate on how
> these might work with OSPF?
>
> John
>
> >>> "Dennis H" 7/9/01 1:42:22 PM >>>
> Split horizon and poison reverse... just make sure to investigate how
> these
> operate with OSPF and frame relay configurations. There are several
> caveats
> to be aware of.
>
>
> ""Stephen Skinner"" wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > guys,
> >
> > see if you can help me with a senario i am working on for the exam
> >
> > 8 routers
> >
> > a,b running HSRP connected to eachother and c,d via 100 meg ethernet
> >
> > c,d Runiing connected to eachother and a,b via 100 meg ethernet
> >
> > c,d connected to e,f via frame relay
> >
> > c is primary frame
> >
> > d is backup ...NO load balancing atall
> >
> >
> > g,h running HSRP connected to eachother and c,d via 100 meg ethernet
> >
> > e,f running ethernet to eachother and c,d via 100 meg ether
> >
> > e,f running frame relay to c,d
> >
> > primary frame c,e backup frame d,f
> >
> > the 8 routers are split over 2 sites
> >
> > eigrp is running on a,b,c,d,e,f
> >
> > ospf is running on e,f,g,h
> >
> > Q1 various sets of router (a,b and g,h) can advertise various routes
> to
> > multiple routers (ab to c and d) (gh to e and f) thus the possiblilty
> of
> > routing loops (on LAN) could occour ....how can i stop this...
> >
> >
> >
> > i have more questions but i will post them one at a time......
> >
> > i have encluded a BMP file on this email with the design in it
> >
> >
> >
> _________________________________________________________________________
> > Get Your Private, Free E-mail from MSN Hotmail at
> http://www.hotmail.com.
> >
> > [GroupStudy.com removed an attachment of type image/bmp which had a
> name
> of
> > 1-secmap.bmp]
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=11700&t=11466
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
