From: Serhat Aslan (serhatworks@gmail.com)
Date: Mon Aug 13 2007 - 01:54:26 ART
Hi Toh,
Redistribution statement is ok. If you didn't enter any
connected->to->Routing protocol there is no consideration to redistribute
connected separately when you redistribute any routing protocol. If you made
an connected redistribution, you have to consider how have to care
interfaces network(/32,24,etc..). You can accept this a an thumb rule. From
GS archive, you can find more thumb rules about those issues.
Let me summarize your last question
(Lo0 + OSPF -> RIP ) --> for Lo0 : Connected --> RIP
(Lo0 + EIGRP -> RIP ) --> for Lo0 : Connected --> RIP
process-1 ) OSPF -> RIP
process-2 ) EIGRP -> RIP
process-3) Connected(EIGRP+RIP enabled interfaces and Lo0) --> RIP
then: Routing table Metrics
* lowest AD metric win for Lo0.
AD-EIGRP < AD-OSPF so it will advertise by EIGRP to RIP.
for example:
lo0:1.1.1.1
OSPF-> network 10.0.0.1 + lo0
EIGRP -> network 192.168.0.1 + lo0
RIP -> network 172.16.1.0
(Test-Router-A) -----(RIP) ----- (Monitor-Router-B)
Redistribuion -> process ( above case)
.with metric
case-a)
Router-A
EIGRP->RIP metric -1
OSPF -> RIP metric -1
Router-B
Routing table : 1.1.1.1 ->[120/1]
case-b)
Router-A
EIGRP->RIP metric -3 (!)
OSPF -> RIP metric -1
Router-B
Routing table : 1.1.1.1 ->[120/3] (!)
case-c)
Router-A
EIGRP-> RIP metric -3
OSPF -> RIP metric -1
OSPF -> DISTANCE 10 (!!)
Router-B
Routing table : 1.1.1.1 ->[120/1] (!!)
------
Serhat Aslan
On 8/13/07, Toh Soon, Lim <tohsoon28@gmail.com> wrote:
>
> Hi Serhat,
>
> I have that solution in mind too. FYI, you can add the Lo0 to the
> "route-map permit 10" statement itself, as follows:
>
> !
> route-map REDISTCON permit 10
> match interface Serial0/0/1 Loopback0
> !
>
> It will match interface S0/0/1 or Lo0. Do correct me if this is not right.
>
> If I only redistribute OSPF into RIP (without redistributing connected),
> then interface Lo0 is considered an OSPF route. If I redistribute both
> connected and OSPF into RIP, then Lo0 is considered a connected route. Is
> there a rule of thumb to this?
>
> Let's change the scenario a little bit; although a bad practice, for
> discussion sake let's assume Lo0 is covered by OSPF and EIGRP, and I
> redistribute OSPF and EIGRP into RIP. So from which protocol (OSPF/EIGRP)
> will Lo0 be redistributed into RIP?
>
>
> Thank you.
>
> Confused,
> Lim TS
>
>
> On 8/13/07, Serhat Aslan <serhatworks@gmail.com > wrote:
> >
> > Hi Toh,
> > add this statement :)
> > route-map REDISTCON permit 20
> > match interface lo0
> >
> > Redistribution can be done only when a route is on the routing table,
> > at the routing table 192.168.x.x/32 is show as connected not ospf so you
> > have to include it as in the connected statements.
> >
> >
> > Serhat Aslan
> >
> >
> > On 8/12/07, Toh Soon, Lim < tohsoon28@gmail.com> wrote:
> >
> > > Hi All,
> > >
> > > I'm stuck with a problem which I'd like to seek clarification from the
> > > group.
> > >
> > > R2 (S0/0/0.24 p2p)----------frame relay pvc (subnet
> > > 172.30.24.0/24)----------(S0/0.42
> > > <http://172.30.24.0/24%29----------%28S0/0.42>p2p) R4
> > >
> > > RIPv2 is run across the FR link between R2 and R4. The other
> > > interfaces of
> > > R2 are in multiple OSPF areas; their IP addresses are as follows:
> > >
> > > L0 : 192.168.2.2/32 - Area 1
> > > F0/0 : 172.30.12.2/26 - Area 12
> > > S0/0/0.100 : 172.30.100.2/29 - Area 0
> > >
> > > There's one connected interface on R2 (S0/0/1 - 172.30.25/0/24) not
> > > covered
> > > by OSPF or RIP. It is to be redistributed into OSPF and RIP.
> > >
> > > I practise being very specific with what connected routes to
> > > redistribute.
> > > Hence, my R2 config is as follows:
> > >
> > > !
> > > router rip
> > > version 2
> > > redistribute connected metric 5 route-map REDISTCON
> > > redistribute ospf 1 metric 5 match internal external 1 external 2
> > > passive-interface default
> > > no passive-interface Serial0/0/0.24
> > > network 172.30.0.0
> > > no auto-summary
> > > !
> > > route-map REDISTCON permit 10
> > > match interface Serial0/0/1
> > > !
> > >
> > > The issue with the above config is, the route 192.168.2.2/32(Loopback0)
> > > does not appear on R4. At first look, I expected it (as an OSPF route)
> > > to be
> > > redistributed into RIP but it wasn't. Doing "debug ip rip" on R2 shows
> > > R2
> > > not sending 192.168.2.2/32 out its FR interface.
> > >
> > > My hypothesis is, since I'm doing redistribute connected and ospf into
> > > RIP
> > > at the same time, R2 treats its Lo0 interface as a connected network
> > > rather
> > > than an OSPF network. Therefore it is denied by the route-map in the
> > > "redistribute connected" command. Arguing along the same line, the
> > > other two
> > > routes (172.30.12.2/26 & 172.30.100.2/29) should have been denied too
> > > but
> > > they appeared on R4 ! Their metric is 1, meaning they are advertised
> > > by RIP
> > > internally (the "network 172.30.0.0" statement covers them).
> > >
> > > My workaround is to redistribute connected without the route-map.
> > > Anyone
> > > please advise me a better way to accomplish this task.
> > >
> > >
> > > Thank you.
> > >
> > > B.Rgds,
> > > Lim TS
> > >
> > >
> > > _______________________________________________________________________
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> > > http://www.groupstudy.com/list/CCIELab.html
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