From: Joe Soricelli (jsoricelli@xxxxxxxx)
Date: Fri Jul 23 1999 - 11:19:10 GMT-3
Not exactly.
What I get out of Bill's response is this.
BGP (with the sync default on) needs to see the route in the routing table
by either an IGP or static before it will mark it as valid and announce it
to an external BGP neighbor. The route in question was not redistributed
into RIP by BGP because BGP did not place the route into the routng table,
it was statically configured.
When the static route was removed and no synch turned on, BGP was the
protocol that placed the route into the routing table and therefore the
redistribution into RIP kicked in.
-HTH,
Joe
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-----Original Message-----
From: Jason Aarons <jaarons@hotmail.com>
To: bcarter@family-net.net <bcarter@family-net.net>
Cc: ccielab@groupstudy.com <ccielab@groupstudy.com>
Date: Friday, July 23, 1999 9:36 AM
Subject: Your lab recreation of my BGP config
>So if a route is in the route table as static, BGP will not advertise
route.
> It has to be RIP, EIGRP, OSPF, etc or no sync.
>
>Is that what we are finding ?
>
>
>----Original Message Follows----
>From: Bill Carter <bcarter@family-net.net>
>To: Jason Aarons <jaarons@hotmail.com>
>Subject: Re: BGP config
>
>I correction. I tried this in the lab. I had 2 BGP routers in AS 51.
They
>were using 150.100.X.X as the IGP. Router A was announcing network
10.0.0.0
>(loop 0 10.1.1.1). Router B had a static route 10.0.0.0 /24 150.100.1.1 .
>Router B was redist BGP into RIP Domain. Sho ip bgp on Router B sho the
>10.0.0.0 as valid and active and synced. Router B was NOT redistributing
>10.0.0.0.
>
>I removed the static route and added no sync to both BGP routers and the
>route
>was redistributed into the RIP domain.
>
>Jason Aarons wrote:
>
> > If I didn't want to do the "no sync", is there other option to add
static
> > routes ? To me it seems crazy that the Internal routing protocol must
>know
> > about the external network before the External routing protocol will
talk
>to
> > the External routing protocol neighbor.
> >
> > I was reading more about this...but haven't yet fully grasped it.
> >
> > ----Original Message Follows----
> > From: Bill Carter <bcarter@family-net.net>
> > To: Jason Aarons <jaarons@hotmail.com>
> > Subject: Re: BGP config
> > Date: Thu, 22 Jul 1999 20:48:19 -0500
> >
> > You need to add no sync to BGP 300. The 16.0.0.0 route is not in the
>route
> > tables for the 2 routers. They will not accept routes not known by
>internal
> > routing protocols. Try debug ip bgp events and debug ip bgp updates.
> >
> > Jason Aarons wrote:
> >
> > > Do anyone have some BGP "show ip bgp neighbor" or "show ip bgp
>summary"
> > > outputs between two ASs that are talking ?
> > >
> > > I have two routers connected but am not sure what the "show ip bgp
> > summary"
> > > should show ? I can ping both ways, etc....
> > >
> > > !
> > > interface Loopback0
> > > ip address 16.0.0.1 255.0.0.0
> > > !
> > > interface Serial1
> > > ip address 172.16.1.2 255.255.255.252
> > > clockrate 148000
> > > !
> > > router bgp 300
> > > network 16.0.0.0
> > > neighbor 10.0.0.1 remote-as 100
> > > !
> > > ip classless
> > > ip route 10.0.0.0 255.0.0.0 Serial1
> > > !
> > > END
> > > iowa#ping 10.0.0.1
> > >
> > > Type escape sequence to abort.
> > > Sending 5, 100-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds:
> > > !!!!!
> > > Success rate is 100 percent (5/5), round-trip min/avg/max = 12/14/16
>ms
> > > iowa#
> > >
> > > iowa#show ip bgp neigh
> > > BGP neighbor is 10.0.0.1, remote AS 100, external link
> > > Index 1, Offset 0, Mask 0x2
> > > BGP version 4, remote router ID 0.0.0.0
> > > BGP state = Idle, table version = 0
> > > Last read 00:00:15, hold time is 180, keepalive interval is 60
>seconds
> > > Minimum time between advertisement runs is 30 seconds
> > > Received 0 messages, 0 notifications, 0 in queue
> > > Sent 0 messages, 0 notifications, 0 in queue
> > > Connections established 0; dropped 0
> > > Last reset 00:00:16, due to : User reset request
> > > No. of prefix received 0
> > > External BGP neighbor not directly connected.
> > > No active TCP connection
> > > iowa#show ip bgp summary
> > > BGP table version is 2, main routing table version 2
> > > 1 network entries (1/3 paths) using 208 bytes of memory
> > > 1 BGP path attribute entries using 96 bytes of memory
> > > 0 BGP route-map cache entries using 0 bytes of memory
> > > 0 BGP filter-list cache entries using 0 bytes of memory
> > >
> > > Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
> > > State/PfxRcd
> > >
> > > 10.0.0.1 4 100 0 0 0 0 0 never
>Idle
> > > iowa#
> > >
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