From: Sergey Golovanov (sergey.golovanov@iementor.com)
Date: Thu Jan 25 2007 - 06:34:33 ART
Do you see them all as IA? When BGPvpnv4 routes are redistributed into vrf enabled OSPF a special Down-Bit is set on the routes. And another vrf-enabled OSPF process will always do down-bit checking. If it's set, then it will reject routes. It's a loop prevention mechanism in MPLS VPN environments when a site is dual connected to two PEs. "Capability vrf-lite" will turn off down-bit checking. Well, apparantely down-bit gets set not only for redistributed routes, but also for routes injected with a network command.
--------------------------------------------------------------------
Sergey Golovanov, CCIEx5 (R&S/Security/Voice/Service Provider/Storage)
"Please, don't ask me for my ccie #, there are reasons why I can't release it"
ieMentor Instructor and Content Developer
sergey.golovanov@iementor.com
http://www.iementor.com
> -------Original Message-------
> From: Vishal Patel <vpatel@accessproviders.com.au>
> Subject: RE: OSPF question
> Sent: Jan 25 '07 04:29
>
>
>
> "Capability vrf-lite" seems to install all the routes in the routing
> table.
>
> But I don't know, why it required..
>
> I have jut ospf ..no BGP at all...
>
> VRF is connected directly..
>
>
>
> -----Original Message-----
> From: Sergey Golovanov [mailto:sergey.golovanov@iementor.com]
> Sent: Thursday, 25 January 2007 8:19 PM
> To: Vishal Patel; Michal.Grzybczyk@vattenfall.pl; ccielab@groupstudy.com
> Subject: RE: OSPF question
>
>
> If you use VRF correctly, it will work ;)
>
> two things:
>
> 1. paste "show run" configuration of all those interfaces that you are
> trying to advertise on R1. Are they all configured in "ip vrf forwarding
> GIT"? see my previous message
>
> 2. "capability vrf-lite" is a command that you might need under OSPF. But if
> you only have OSPF and no redistribution from BGPvpnv4 into OSPF, then you
> don't need it.
>
>
> --------------------------------------------------------------------
> Sergey Golovanov, CCIEx5 (R&S/Security/Voice/Service Provider/Storage)
> "Please, don't ask me for my ccie #, there are reasons why I can't release
> it"
> ieMentor Instructor and Content Developer sergey.golovanov@iementor.com
> http://www.iementor.com
>
>
> > -------Original Message-------
> > From: Vishal Patel <vpatel@accessproviders.com.au>
> > Subject: RE: OSPF question
> > Sent: Jan 25 '07 04:10
> >
> > Yeah everything is up / up
> >
> > But I feel "vrf " is not allowing to send routes between areas..not
> sure..
> >
> >
> >
> > -----Original Message-----
> > From: Sergey Golovanov [mailto:sergey.golovanov@iementor.com]
> > Sent: Thursday, 25 January 2007 7:57 PM
> > To: Vishal Patel; Michal.Grzybczyk@vattenfall.pl;
> > ccielab@groupstudy.com
> > Subject: RE: OSPF question
> >
> >
> > hmm... vrf's, are you studying for R&S? :)
> >
> > anyway, check if you have "ip vrf forwarding GIT" on all interfaces
> > that you are trying to advertise on R1 with these network commands:
> >
> > > network 172.22.80.180 0.0.0.3 area 0 > network 192.168.1.17
> > 0.0.0.0 area 0 > network 202.63.64.0 0.0.15.255 area 0 network
> > 202.130.192.0 > 0.0.31.255 area 0 network 203.89.96.0 0.0.31.255
> > area 0
> >
> > and are they all up/up?
> >
> > --------------------------------------------------------------------
> > Sergey Golovanov, CCIEx5 (R&S/Security/Voice/Service
> > Provider/Storage) "Please, don't ask me for my ccie #, there are
> > reasons why I can't release it"
> > ieMentor Instructor and Content Developer
> > sergey.golovanov@iementor.com http://www.iementor.com
> >
> >
> > > -------Original Message-------
> > > From: Vishal Patel <vpatel@accessproviders.com.au> > Subject:
> > RE: OSPF question > Sent: Jan 25 '07 03:52 > > > > Lets make it
> > simple..
> > >
> > > R1 :
> > >
> > > router ospf 300 vrf GIT
> > > router-id 192.168.1.17
> > > log-adjacency-changes
> > > redistribute static metric-type 1 subnets network 10.10.10.0
> > 0.0.0.3 > area 5 network 172.22.80.180 0.0.0.3 area 0 network
> > 192.168.1.17 > 0.0.0.0 area 0 network 202.63.64.0 0.0.15.255 area 0
> > network > 202.130.192.0 0.0.31.255 area 0 network 203.89.96.0
> > 0.0.31.255 area 0 > > > > R2 :
> > >
> > > router ospf 300 vrf GIT
> > > log-adjacency-changes
> > > network 10.10.10.0 0.0.0.3 area 5
> > > !
> > >
> > > R2#sh ip route vrf GIT ospf
> > >
> > > Routing Table: GIT
> > >
> > > 203.89.100.0/29 is subnetted, 1 subnets O E1
> > 203.89.100.80 > [110/21] via 10.10.10.1, 00:12:51, FastEthernet0/1 O
> > E1 > 202.130.198.0/24 [110/21] via 10.10.10.1, 00:12:51,
> > FastEthernet0/1 > > > > Where are the other routes missing :( >
> > > > > > -----Original Message----- > From: Sergey Golovanov
> > [mailto:sergey.golovanov@iementor.com]
> > > Sent: Thursday, 25 January 2007 7:48 PM > To: Vishal Patel;
> > Michal.Grzybczyk@vattenfall.pl; > ccielab@groupstudy.com > Subject:
> > RE: OSPF question > > Your assumption is absolutely correct. Can
> > you post your ospf configs > from R1, R2, and R3?
> > >
> > >
> > >
> > --------------------------------------------------------------------
> > > Sergey Golovanov, CCIEx5 (R&S/Security/Voice/Service >
> > Provider/Storage) "Please, don't ask me for my ccie #, there are >
> > reasons why I can't release it"
> > > ieMentor Instructor and Content Developer >
> > sergey.golovanov@iementor.com http://www.iementor.com > > > >
> > -------Original Message------- > > From: Vishal Patel
> > <vpatel@accessproviders.com.au> > Subject:
> > > RE: OSPF question > Sent: Jan 25 '07 03:32 > > > > Guys , >
> > > > Below is topology > > > R1 ------area 0 -----R2 ----area 5
> > > -----R3 > > Now I understand that...all the routes in area 0 ,
> > will > be avaliable > to in > R3 as Inter-Area route, without
> > doing any > redistribution.
> > > >
> > > > Is it right ? Or my ospf understandin is messed up ?
> > > >
> > > > Because I have a set up right now..where the area 0 routes
> > aren't > > visible at all..
> > > >
> > > >
> > > > Cheers
> > > >
> > > > Vishal
> > > >
> > > >
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> > > Behalf > Of Sergey Golovanov > Sent: Thursday, 25 January 2007
> > > 5:51 PM > To: Michal.Grzybczyk@vattenfall.pl;
> > ccielab@groupstudy.com > > Subject: RE: OSPF question > > can you
> > post "show ip route > net-b" from each router, before and after >
> R1-R4 failure?
> > > >
> > > >
> > > >
> > >
> > --------------------------------------------------------------------
> > > > Sergey Golovanov, CCIEx5 (R&S/Security/Voice/Service > >
> > Provider/Storage) "Please, don't ask me for my ccie #, there are >
> > > reasons why I can't release it"
> > > > ieMentor Instructor and Content Developer > >
> > sergey.golovanov@iementor.com http://www.iementor.com > > > > >
> > -------Original Message------- > > From:
> > > Michal.Grzybczyk@vattenfall.pl > Subject: RE: OSPF > question >
> > > Sent: Jan 25 '07 01:46 > > > Hello, > > I have > very
> > similar > problem with Intra preffered path and asymmetric > >
> > routing during > the link beardown.
> > > > >
> > > > > I configured OSPF on R1,R2,R3 ( R4,R5 only BGP ):
> > > > >
> > > > > Network A
> > > > > |
> > > > > R3 ( as stub no-summary ) > > > / \ > > >
> > / \ > > > R1 ----- R2 > > > | | > > >
> > | | > > > R4 ---- R5 > > > \ / > > >
> > Network B > > > > > > > > > Primary links are: R1-R4 and
> > R1-R3 > Backup : R3 - R2 & > R2-R5 > > > OSPF :
> > > > > R1 to R2 Area 0
> > > > > R1 & R2 to R3 Area 1 as stub no summary > > Everything is
> > ok > > until link R1-R4 went down.
> > > > > Traffic from Network B to Network A is going through: R5-
> > R2- > R3 > > Traffic from Network A to Network B : R3 - R1 - R2 -
> > R5 > > > Ping > and traceroute works perfect but transmision not.
> > > > > I thought that cisco support asymmetric routing but it
> > doesn't work.
> > > > >
> > > > > Has someone got the idea how change OSPF configuration or
> > how > > allow > pass asymmetric traffic in this scenario ?
> > > > >
> > > > > For R3 is enough to get default route.
> > > > >
> > > > >
> > > > > Thanks in advance.
> > > > >
> > > > > Regards,
> > > > > Michal
> > > > >
> > > > > -------------------
> > > > >
> > > > > umm... what do you mean? redistribute connected makes the
> > route > > > External, not Inter-Area. The way you asked the question
> > in the > > > beginning definitely indicates that you have to use
> > Virtual Link > > > > >
> > --------------------------------------------------------------------
> > > > > Sergey Golovanov, CCIEx5 (R&S/Security/Voice/Service > >
> > Provider/Storage) "Please, don't ask me for my ccie #, there are >
> > > reasons why I can't release it"
> > > > > ieMentor Instructor and Content Developer > > >
> > sergey.golovanov@iementor.com http://www.iementor.com > > > > >
> > > -------Original Message------- > > From: Vishal Patel > >
> > <vpatel@accessproviders.com.au> > Subject:
> > > > > RE: OSPF question > Sent: Jan 25 '07 00:58 > > > > I
> > got > it > > fixed..
> > > > > >
> > > > > > Instead of adding network command in router ospf > >
> > I > did > > redistribute connected and it became an Inter - Area route.
> > > > > >
> > > > > > Cheers
> > > > > >
> > > > > >
> > > > > > -----Original Message----- > > > > From: Sergey
> > Golovanov > [mailto:sergey.golovanov@iementor.com]
> > > > > > Sent: Thursday, 25 January 2007 4:49 PM > To: Vishal >
> > Patel; > > ccielab@groupstudy.com > Subject: Re: OSPF question >
> > > > > > create > virtual link through non-backbone area and modify
> > > costs > > > > > >
> > --------------------------------------------------------------------
> > > > > > Sergey Golovanov, CCIEx5 (R&S/Security/Voice/Service >
> > > > > Provider/Storage) "Please, don't ask me for my ccie #, there
> > are > > > > reasons why I can't release it"
> > > > > > ieMentor Instructor and Content Developer > > > >
> > sergey.golovanov@iementor.com http://www.iementor.com > > > > >
> > > > -------Original Message------- > > From: Vishal Patel > > >
> > <vpatel@accessproviders.com.au> > Subject:
> > > > > > OSPF question > Sent: Jan 25 '07 00:34 > > Hey guys ,
> > > > > > > We > know that in OSPF Intra Area route is preferred
> > over Inter Area.
> > > > > > >
> > > > > > > No matter whatz the cost > > > > > > > > > >
> > Can someone please tell me the way to get Intra Area > > Preferred
> > > > over > Inter Area ?
> > > > > > >
> > > > > > > Cheers
> > > > > > >
> > > > > > > Vishal
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> > ______________________________________________________________________
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> > > > >
> > > > >
> > > >
> > >
> > ______________________________________________________________________
> > > > > _ Subscription information may be found at:
> > > > > http://www.groupstudy.com/list/CCIELab.html
> > > >
> > > >
> > > >
> > >
> > ______________________________________________________________________
> > > > _ Subscription information may be found at:
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> > > >
> > > >
> > >
> > >
> >
> >
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