From: uyota oyearone (spycharlies@hotmail.com)
Date: Mon Jan 21 2008 - 03:28:08 ARST
Right! IEWBv4.1. Adv. Tech Lab, BGP Confederation. i will adv. the .0.0/24
net. into BGP, i believe that shld work. For your second suggestion , i dont
think is correct to configure a neighbor on a different AS as next-hop-self.
Thanks,
Uyota
Date: Sun, 20 Jan 2008 13:39:42 +0000From: sethuvignesh@yahoo.co.inSubject:
RE: troubleshooting bgp confederation, HELP!!To: spycharlies@hotmail.com
Hi Uyota,
I think you are working on ATS Labworkbook from Internetwrokexpert. It is
under the topic BGP confederation. The same issue is faced by me.
My suggestion is
1. Publish the network link b/w R2 and R5 ie 155.1.0.0/24 under bgp process
on R2.
or
2.Use neighbor 155.1.23.3 next hop self command on R2.
This will resolve this issue.
HTH,
Vignesh
uyota oyearone <spycharlies@hotmail.com> wrote:
R3#sh ip bgpNetwork Next Hop Metric LocPrf Weight Path*> 155.1.3.0/24 0.0.0.0
0 32768 i* 155.1.5.0/24155.1.0.5 0 100 0 (65002) 1 iThere must be something
wrong with my frameSwitch. The next hop cannotpossiblybe 155.1.0.5. since r3 &
r5 are not directly connected. and # no frameinverse-arp # is enabled on
r5.***From your suggestion, r5 is not running ospf. its only peeing with
R2.***when i do a #sho ip route , on r3, i was hoping to see something
like...[B 155.1.5.0 [200/0] via 155.1.23.2, 00:....], but this does not show
up onthe routing table on r3.hmmm... This tells me r2 is no advertising the
network to R3.from R3#show ip bgp nei [r3] advertised-routes, this comes
up..*> 155.1.5.0/24 155.1.0.5 0 0 1 iWhat else......????Thanks> From:
r.s.cciestudy@gmail.com> To: spycharlies@hotmail.com;ccielab@groupstudy.com>
Subject: Re: troubleshooting bgp confederation,HELP!!> Date: Fri, 18 Jan 2008
12:20:28 -0800> > Hey,> > Just do a show ip bgpon R3. Look at the next-hop for
R5's route. That is > your problem area. Youdid not advertise it to OSPF.> >
HTH,> Ed> > > ----- Original Message ----- >From: "uyota oyearone" > To:
"CCIE"> Sent: Wednesday, January 16, 2008 4:15 PM> Subject:troubleshooting bgp
confederation, HELP!!> > > > Hi Engineers;> >> > Am havingproblems pinging and
tracing an advertised network via BGP> > Confederation.Here is the basic
config. let me know if am missing > > something> > OR how ican troubleshooting
this problem.> >> > ***> > [R3(as
65013)]s1/3-->s1/1[r2(as65002)]s1/0-->frameRelay-->s1/0[r5(as > > 1)]--r3> > &
R2 Directly connected,r2 & R5 thru. Frame Relay***> > --R3#> > interface
Ethernet0/0 ip address155.1.3.3 255.255.255.0!router ospf 1> > router-id
3.3.3.3log-adjacency-changes network 155.1.23.3 0.0.0.0 area> > 0!router bgp
65013 nosynchronization bgp log-neighbor-changes bgp> > confederation
identifier 2 bgpconfederation peers 65002 network 155.1.3.0> > mask
255.255.255.0 neighbor155.1.23.2 remote-as 65002 no auto-summary> > --R2#> >
interface Ethernet0/1ip address 155.1.5.5 255.255.255.0!interface > >
Serial1/0> > ip address155.1.0.2 255.255.255.0 encapsulation frame-relay ip
ospf > > network> >broadcast serial restart-delay 0 no
dce-terminal-timing-enable frame-relay > >map> > ip 155.1.0.5 205 broadcast no
frame-relay inverse-arp!router ospf 1 > >router-id> > 2.2.2.2
log-adjacency-changes network 155.1.23.2 0.0.0.0 area0!router bgp> > 65002 no
synchronization bgp log-neighbor-changes bgpconfederation > > identifier> > 2
bgp confederation peers 65013 network155.1.2.0 mask 255.255.255.0 > >
neighbor> > 155.1.0.5 remote-as 1 neighbor155.1.23.3 remote-as 65013 no> >
auto-summary--R5#> > interface Ethernet0/1 ipaddress 155.1.5.5
255.255.255.0!interface > > Serial1/0> > ip address155.1.0.5 255.255.255.0
encapsulation frame-relay ip ospf > > network> >broadcast serial restart-delay
0 no dce-terminal-timing-enable frame-relay > >map> > ip 155.1.0.2 502
broadcast no frame-relay inverse-arp!router bgp 1 no>> synchronization bgp
log-neighbor-changes network 155.1.5.0 mask > >255.255.255.0> > neighbor
155.1.0.2 remote-as 2 no auto-summary> > ===r5# ship bgp> > Network Next Hop
Metric LocPrf Weight Path*>> > 155.1.2.0/24155.1.0.2 0 0 2 i*> > >
155.1.3.0/24> > 155.1.0.2 0 2 i*> 155.1.5.0/240.0.0.0> > 0 32768 i> > r5#ping
155.1.0.2 (**frame connection workin fine)> >Type escape sequence to
abort.Sending 5, 100-byte ICMP Echos to 155.1.0.2,> >timeout is 2
seconds:!!!!!Success rate is 100 percent (5/5), round-trip> >min/avg/max =
40/68/120 ms> > --r5#ping 155.1.2.2 so e0/1 (** directlyconnected adv. netw
working fine)> > Type escape sequence to abort.Sending 5,100-byte ICMP Echos
to 155.1.2.2,> > timeout is 2 seconds:Packet sent with asource address of> >
155.1.5.5!!!!!Success rate is 100 percent (5/5),round-trip min/avg/max => >
32/64/92 ms> > --r5#ping 155.1.3.3 so e0/1> > Typeescape sequence to
abort.Sending 5, 100-byte ICMP Echos tPacket sent > > with>> a source
addres.....Success rate is 0 percent (0/5)> >> > ***We would assumethe problem
is btw r2 & r3***> > R2#sh ip bgp> > Network Next Hop MetricLocPrf Weight
Path*>> > 155.1.2.0/24 0.0.0.0 0 32768 i*> 155.1.3.0/24> >155.1.23.3 0 100 0
(65013) i*> 155.1.5.0/24> > 155.1.0.5 0 0 1 i> > *>155.1.5.0/24 155.1.0.5 0 0
1 i--r2#sh ip > > bgp> > su> > Neighbor V ASMsgRcvd MsgSent TblVer InQ OutQ
Up/Down> > State/PfxRcd155.1.0.5 4 1 84 86 5 00> > 01:19:10 1155.1.23.3 4
65013 84 84 5 0 > > 0> > 01:18:34 2> >> > R2#ping155.1.3.3 so fa0/0> > Type
escape sequence to abort.Sending 5, 100-byte ICMPEchos to 155.1.3.3,> >
timeout is 2 seconds:Packet sent with a source addressof> >
155.1.2.2!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max=> >
24/52/84 ms> > *****R3#clea ip bgp 155.1.2.2Debug on R3******Mar
104:00:51.003:> > %BGP-5-ADJCHANGE: neighbor 155.1.23.2 Up*Mar 1
04:00:51.019:BGP(0):> > 155.1.23.2 send UPDATE (format) 155.1.3.0/24, next
155.1.23.3,metric 0, > > path> > Local*Mar 1 04:00:51.023: BGP(0): 155.1.23.2
NEXT_HOPpart 1 net> > 155.1.4.0/24, next155.1.13.1*Mar 1 04:00:51.027:
BGP(0):155.1.23.2 send> > UPDATE (format) 155.1.4.0/24, next 155.1.13.1,
metric 0,path 3*Mar 1> > 04:00:51.047: BGP(0): 155.1.23.2 rcvd UPDATE w/ attr:
nexthop155.1.23.2,> > origin i, localpref 100, metric 0, path (65002)*Mar
104:00:51.055: > > BGP(0):> > 155.1.23.2 rcvd 155.1.2.0/24*Mar 1
04:00:51.063:BGP(0): 155.1.23.2 rcvd> > UPDATE w/ attr: nexthop 155.1.0.5,
origin i,localpref 100, metric 0, path> > (65002) 1*Mar 1 04:00:51.071:
BGP(0):155.1.23.2 rcvd 155.1.5.0/24> > ******This shows R3 received the
network155.1.5.0/24. **No access list,> > community etc. has been
configured***> >> >What other troubleshooting step do i take to enable me know
y I'm unable > >to> > ping of trace this network.> > Regards> >> >> >> >> >>
>> >> >> >> >>
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