From: Kenny Sallee (ksallee@xxxxxxxxx)
Date: Sun Dec 10 2000 - 14:39:55 GMT-3
the same subnet. Why would OSPF set the next hop for itself on R7 when the
real next hop is on the same IP subnet - R4. The only work around I can
think of is the frame map statement or us point-to-point sub-interfaces on
the hub R7 and put the spokes in different IP subnets. Or you can do policy
routing on R3 to force everything to next hop of R7 ( ip local policy
)....Good luck
Kenny
> ----------
> From: Gopal@Netlanceconsulting[SMTP:NETLANCECONSULTING@YAHOO.COM]
> Sent: Sunday, December 10, 2000 4:58:33 AM
> To: Ronnie Royston; 'zhangxianqi'
> Cc: ccielab@groupstudy.com
> Subject: Re: An equivalent to NEXT_HOP_SELF for an IGP?
> Auto forwarded by a Rule
>
> Hi Ronnie:
> Mapping R4 is surely a work around. But, ospf doesn't have next-hop
> attribute and R3 seeing R4 as next-hop is wrong/not-expected (can some one
> comment?) , desirable in many situations though.
> Could you verify these: 1)in R3 are you seeing the RIP originated routes
> as
> ospf-external routes?in R4, sho ip route 2) Is R4 ospf-peering with
> R7?(sho
> ip os ne''in R4) 3)can you also give the ios image on R7?
> If i get time i will work on my routers and give more info.
> regards,
> gopal
>
> -----Original Message-----
> From: Ronnie Royston <RonnieR@globaldatasys.com>
> To: 'zhangxianqi' <xianqizhang@sina.com>
> Cc: ccielab@groupstudy.com <ccielab@groupstudy.com>
> Date: Saturday, December 09, 2000 2:03 PM
> Subject: RE: An equivalent to NEXT_HOP_SELF for an IGP?
>
>
> >Looks like the only way to do this is to map the ip address of the
> >non-connected remote router to the central router, e.g., 'frame map ip
> >3.4.7.19 104' where 104 points to the middle guy, 3.4.7.17. I couldn't
> get
> >route-maps to fix this.
> >
> >R3(.18) R4(.19)
> > \ /
> > \ /
> > R7(3.4.7.17)
> >
> >-----Original Message-----
> >From: zhangxianqi [mailto:xianqizhang@sina.com]
> >Sent: Friday, December 08, 2000 7:35 PM
> >To: Ronnie Royston
> >Cc: ccielab@groupstudy.com
> >Subject: Re: An equivalent to NEXT_HOP_SELF for an IGP?
> >
> >
> >you can do it on redistribut use route-map,in the route-map,set next-hop.
> >I don't try it on my router,just from memory,sorry if i am wrong.
> >regards
> >xianqi
> >----- Original Message -----
> >From: Ronnie Royston <RonnieR@globaldatasys.com>
> >To: <ccielab@groupstudy.com>
> >Sent: Saturday, December 09, 2000 8:22 AM
> >Subject: An equivalent to NEXT_HOP_SELF for an IGP?
> >
> >
> >> Is there a way to redistribute routes between IGPs in such a way as to
> set
> >> redistributed routes to point to this router as the next hop?
> >>
> >> I set up a lab where a multipoint subinterface is connecting R7 as
> below:
> >>
> >> R3 R4
> >> \ /
> >> \ /
> >> R7
> >>
> >> R7 shares OSPF area0 with R3 and speaks RIPv2 to R4 (passive interface
> >with
> >> neighbor command). R3 is getting the routes from RIP redistributed
> just
> >> fine and as expected, with R4's serial interface as the next hop.
> >However,
> >> routing fails because I only have R3 and R4 frame mapped to R7 and not
> >each
> >> other. I want to use a route-map in redistributing into OSPF to tell
> the
> >> OSPF routers to use R7s serial interface as the next hop for the routes
> >> learned via RIP. I can't get this to work. How should I resolve this,
> >or,
> >> is this a completely useless senario and there are no "knobs" to turn
> to
> >fix
> >> this? Thanks everyone.
> >>
> >>
> >>
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