From: Huy Luu (hluu@xxxxxxxxxxxx)
Date: Wed Mar 20 2002 - 19:31:17 GMT-3
I also tried it with the no auto-summary command, then the router should
not auto summarize, or does it?
May be I misinterpreted the use of the no auto-summary command. Can you
please clarify?
Thanks.
Tshon
<tshon@netzero To: Huy Luu <hluu@veroxity.com>
.net> cc: ccielab@groupstudy.com, Lab Ca
ndidate <labccie@yahoo.com>,
nobody@groupstudy.com
03/20/02 05:29 Subject: Re: BGP routes don't show
up in BGP table
PM
So, the point here is this.
BGP will not advertise a route unless that route is exactly in its
routing table.
You'll notice that when you didn't have a mask, BGP assumes the Default
mask
12.12.0.0 255.0.0.0 it then looks in its table for a 12.0.0.0 network,
and since
it is not found, it doesn't advertise it.
But once you gave the appropriate mask the router found it in the
routing table
and advertised it.
network 12.12.0.0 255.255.0.0
S 12.12.0.0 is directly connected, Null0
Huy Luu wrote:
>My config
>
>
>
>R5---------R6
>R5 has static route to 12.12.0.0 to next hop null 0.
>R5 learned 137.20.30.0/24 through OSPF
>
>
>R5#sho run
>Building configuration...
>
>Current configuration : 2465 bytes
>!
>version 12.1
>service timestamps debug uptime
>service timestamps log uptime
>no service password-encryption
>service udp-small-servers
>service tcp-small-servers
>!
>hostname R5
>!
>no logging console
>no logging monitor
>!
>!
>!
>!
>!
>ip subnet-zero
>no ip domain-lookup
>!
>appletalk routing
>ipx routing 0060.5cf4.721f
>!
>!
>!
>interface Loopback0
> no ip address
> no ip route-cache
> no ip mroute-cache
>!
>interface Loopback10
> ip address 1.1.1.1 255.255.255.0
>!
>interface Ethernet0
> ip address 137.20.50.1 255.255.255.0
> no ip route-cache
> ip ospf cost 1
> ip ospf priority 255
> no ip mroute-cache
> appletalk cable-range 600-600 600.19
> appletalk zone R5E0
> ipx network 510
> ipx network 590 encapsulation SAP secondary
>!
>interface Serial0
> ip address 137.20.101.5 255.255.255.0
> no ip route-cache
> ip ospf network point-to-multipoint
> no ip mroute-cache
> appletalk cable-range 300-300 300.109
> appletalk zone R1S02
> ipx input-sap-filter 1000
> ipx network 230
> custom-queue-list 1
>!
>interface Serial1
> no ip address
> no ip route-cache
> no ip mroute-cache
> shutdown
>!
>router ospf 100
> log-adjacency-changes
> redistribute static
> network 137.20.101.0 0.0.0.255 area 0
>!
>router bgp 2
> no synchronization
> bgp log-neighbor-changes
> network 12.12.0.0 mask 255.255.0.0
> network 137.20.30.0 mask 255.255.255.0
> neighbor 137.20.50.7 remote-as 3
> neighbor 137.20.50.7 soft-reconfiguration inbound
> no auto-summary
>!
>ip classless
>ip route 12.12.0.0 255.255.0.0 Null0
>no ip http server
>ip ospf name-lookup
>!
>!
>ip prefix-list ALL seq 5 permit 0.0.0.0/0 le 32
>!
>ip prefix-list NORIP seq 5 permit 192.168.100.0/24
>!
>ip prefix-list RIPROUTE seq 5 permit 192.168.100.0/24
>access-list 2 deny 200.200.0.0 0.0.255.255
>access-list 2 permit any
>access-list 19 permit any
>access-list 20 permit 192.168.100.0 0.0.0.255
>access-list 35 permit 192.168.1.0 0.0.254.0
>access-list 120 permit ip 192.168.100.0 0.0.0.255 any
>access-list 1000 permit 320 4 Fileservers
>access-list 1000 permit 320 4 Fileserver
>queue-list 1 protocol ip 1 tcp telnet
>queue-list 1 protocol ip 2
>queue-list 1 protocol ipx 3
>queue-list 1 default 4
>route-map NORIP deny 10
> match ip address 120
>!
>route-map NORIP deny 15
> match ip address 35
>!
>route-map NORIP permit 20
> match ip address 19
>!
>!
>!
>!
>ipx router eigrp 2
> network 230
>!
>!
>!
>alias exec sixr sho ipx route
>alias exec sixb sho ipx interface brief
>!
>line con 0
>line aux 0
> transport input all
>line vty 0 4
> password cisco
> no login
>!
>end
>
>R5 is advertising both networks with the mask specified
>R5#sho ip bgp neigh 137.20.50.7 ad
>BGP table version is 50, local router ID is 137.20.101.5
>Status codes: s suppressed, d damped, h history, * valid, > best, i -
>internal
>Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
>*> 12.12.0.0/16 0.0.0.0 0 32768 i
>*> 137.20.30.0/24 137.20.101.3 65 32768 i
>
>
>R5#sho ip route
>Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
>area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
>
>Gateway of last resort is not set
>
> 1.0.0.0/24 is subnetted, 1 subnets
>C 1.1.1.0 is directly connected, Loopback10
> 137.20.0.0/16 is variably subnetted, 6 subnets, 2 masks
>O IA 137.20.30.0/24 [110/65] via 137.20.101.3, 00:18:48, Serial0
>O IA 137.20.3.0/24 [110/65] via 137.20.101.3, 00:18:48, Serial0
>C 137.20.50.0/24 is directly connected, Ethernet0
>C 137.20.101.0/24 is directly connected, Serial0
>O IA 137.20.103.0/24 [110/74] via 137.20.101.3, 00:18:48, Serial0
>O 137.20.101.3/32 [110/64] via 137.20.101.3, 00:18:49, Serial0
> 12.0.0.0/16 is subnetted, 1 subnets
>S 12.12.0.0 is directly connected, Null0
>
>
>
>Now I use the network statement without the mask option
>R5#sho run
>Building configuration...
>
>Current configuration : 2429 bytes
>!
>version 12.1
>service timestamps debug uptime
>service timestamps log uptime
>no service password-encryption
>service udp-small-servers
>service tcp-small-servers
>!
>hostname R5
>!
>no logging console
>no logging monitor
>!
>!
>!
>!
>!
>ip subnet-zero
>no ip domain-lookup
>!
>appletalk routing
>ipx routing 0060.5cf4.721f
>!
>!
>!
>interface Loopback0
> no ip address
> no ip route-cache
> no ip mroute-cache
>!
>interface Loopback10
> ip address 1.1.1.1 255.255.255.0
>!
>interface Ethernet0
> ip address 137.20.50.1 255.255.255.0
> no ip route-cache
> ip ospf cost 1
> ip ospf priority 255
> no ip mroute-cache
> appletalk cable-range 600-600 600.19
> appletalk zone R5E0
> ipx network 510
> ipx network 590 encapsulation SAP secondary
>!
>interface Serial0
> ip address 137.20.101.5 255.255.255.0
> no ip route-cache
> ip ospf network point-to-multipoint
> no ip mroute-cache
> appletalk cable-range 300-300 300.109
> appletalk zone R1S02
> ipx input-sap-filter 1000
> ipx network 230
> custom-queue-list 1
>!
>interface Serial1
> no ip address
> no ip route-cache
> no ip mroute-cache
> shutdown
>!
>router ospf 100
> log-adjacency-changes
> redistribute static
> network 137.20.101.0 0.0.0.255 area 0
>!
>router bgp 2
> no synchronization
> bgp log-neighbor-changes
> network 1.1.1.0
> network 12.12.0.0
> network 137.20.30.0
> network 137.20.103.0
> neighbor 137.20.50.7 remote-as 3
> neighbor 137.20.50.7 soft-reconfiguration inbound
> no auto-summary
>!
>
>
>R5#sho ip bgp
>NONE
>R5#sho ip bgp neigh 137.20.50.7 ad
>NONE
>
>R5#sho ip route
>Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
>area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
>
>Gateway of last resort is not set
>
> 1.0.0.0/24 is subnetted, 1 subnets
>C 1.1.1.0 is directly connected, Loopback10
> 137.20.0.0/16 is variably subnetted, 6 subnets, 2 masks
>O IA 137.20.30.0/24 [110/65] via 137.20.101.3, 00:21:57, Serial0
>O IA 137.20.3.0/24 [110/65] via 137.20.101.3, 00:21:57, Serial0
>C 137.20.50.0/24 is directly connected, Ethernet0
>C 137.20.101.0/24 is directly connected, Serial0
>O IA 137.20.103.0/24 [110/74] via 137.20.101.3, 00:21:57, Serial0
>O 137.20.101.3/32 [110/64] via 137.20.101.3, 00:21:58, Serial0
> 12.0.0.0/16 is subnetted, 1 subnets
>S 12.12.0.0 is directly connected, Null0
>
>
>
> Tshon
> <tshon@netzero To: Huy Luu
<hluu@veroxity.com>
> .net> cc: ccielab@groupstudy.com,
Lab Candidate <labccie@yahoo.com>,
> nobody@groupstudy.com
> 03/20/02 03:19 Subject: Re: BGP routes don't
show up in BGP table
> PM
>
>
>
>
>
>
>Why don't you repaste the configs and the routing tables now, for the
>archives. So that people
>can later refence what you did before and what you did after.
>
>Huy Luu wrote:
> I got it to work, by adding the additional mask command.
> But I'm still confuse. First I used the network 1.1.1.0, which did
> not
> work. I also added no sync and no auto-summary, which did not work.
> I
> thought that if I use the network command to advertise a network, and
> if I
> have a valid route to a subnet of that network, it should advertise
> the
> network and auto summarize at the classful boundary. In this example
> the
> router should summarize and advertise 1.0.0.0/8 if I use the network
> statement 1.1.1.0, but it did not.
>
>
>
>
> Tshon
>
> <tshon@netzero To: Lab Candidate
> <labccie@yahoo.com>
>
> .net> cc:
> ccielab@groupstudy.com
> Sent by: Subject: Re: BGP routes
> don't show up in BGP table
> nobody@groupst
>
> udy.com
>
>
>
> 03/20/02 02:31
>
> PM
>
> Please respond
>
> to Tshon
>
>
>
>
>
>
>
> You will only advertis networks you can reach. You don't have a
> network
> 1.1.1.1 in your routing table.
> You don't have a network 2.2.2.2 in your routing table. Try Network
> 1.1.1.0 and 2.2.2.0.
>
> Tshon
>
> Lab Candidate wrote:
>
> Here is a basic BGP setup with r1 and r2:
> r1 AS100 r2 AS200
> s0----------------s0
> lo0 1.1.1.1 lo0 2.2.2.2
> I am advertising both r1's and r2's loopbacks lo0 by putting
> under a
> network statement.
> but somehow they never showed up in the other's BGP table. What
> am I doing
> wrong?
> here is the configs and output from both r1 and r2:
>
> r1#
> 1d00h: BGP: 192.168.1.2 went from Idle to Active
> 1d00h: BGP: 192.168.1.2 open active, delay 15324ms
> 1d00h: BGP: 192.168.1.2 open active, local address 192.168.1.1
> 1d00h: BGP: scanning routing tables
> 1d00h: BGP: nettable_scan: invalidate local path for 1.0.0.0/8
> 1d00h: BGP: nettable_scan: invalidate sourced path for 1.0.0.0/8
> 1d00h: BGP: no valid path for 1.0.0.0/8
> 1d00h: BGP: nettable_walker 1.0.0.0/8 no best path
>
> r1#sh ip ro
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile,
> B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter
> area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external
> type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E -
> EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * -
> candidate
> default
> U - per-user static route, o - ODR
>
> Gateway of last resort is not set
>
> 1.0.0.0/24 is subnetted, 1 subnets
> C 1.1.1.0 is directly connected, Loopback0
> C 192.168.1.0/24 is directly connected, Serial0
>
> r1#sh ip bgp
> {blank}
> r1#
>
> r1#sh run
> Building configuration...
>
> Current configuration:
> !
> version 12.0
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname r1
> !
> !
> ip subnet-zero
> !
> !
> !
> interface Loopback0
> ip address 1.1.1.1 255.255.255.0
> no ip directed-broadcast
> !
> interface Ethernet0
> no ip address
> no ip directed-broadcast
> shutdown
> !
> interface Serial0
> ip address 192.168.1.1 255.255.255.0
> no ip directed-broadcast
> clockrate 64000
> !
> interface Serial1
> no ip address
> no ip directed-broadcast
> shutdown
> !
> router bgp 100
> network 1.1.1.1
> neighbor 192.168
> .1.2 remote-as 200
> !
> ip classless
> !
> !
> line con 0
> exec-timeout 0 0
> logging synchronous
> transport input none
> line aux 0
> line vty 0 4
> !
> end
>
> r1#
> r1#sh ip bgp nei
> BGP neighbor is 192.168.1.2, remote AS 200, external link
> Index 1, Offset 0, Mask 0x2
> BGP version 4, remote router ID 2.2.2.2
> BGP state = Established, table version = 25, up for 00:03:02
> Last read 00:00:03, hold time is 180, keepalive interval is 60
> seconds
> Minimum time between advertisement runs is 30 seconds
> Received 6 messages, 0 notifications, 0 in queue
> Sent 6 messages, 0 notifications, 0 in queue
> Prefix advertised 0, suppressed 0, withdrawn 0
> Connections established 1; dropped 0
> Last reset never
> 0 accepted prefixes consume 0 bytes
> 0 history paths consume 0 bytes
> Connection state is ESTAB, I/O status: 1, unread input bytes: 0
> Local host: 192.168.1.1, Local port: 11000
> Foreign host: 192.168.1.2, Foreign port: 179
>
>
> Enqueued packets for retransmit: 0, input: 0 mis-ordered: 0 (0
> bytes)
>
> Event Timers (current time is 0x545E3C0):
> Timer Starts Wakeups Next
> Retrans 19 12 0x0
> TimeWait 0 0 0x0
> AckHold 6 2 0x0
> SendWnd 0 0 0x0
> KeepAlive 0 0 0x0
> GiveUp 0 0 0x0
> PmtuAger 0 0 0x0
> DeadWait 0 0 0x0
>
> iss: 278568032 snduna: 278568157 sndnxt: 278568157
> sndwnd: 16260
> irs: 2897909981 rcvnxt: 2897910106 rcvwnd: 16260
> delrcvwnd: 124
>
> SRTT: 614 ms, RTTO: 4262 ms, RTV: 1517 ms, KRTT: 0 ms
> minRTT: 24 ms, maxRTT: 300 ms, ACK hold: 200 ms
> Flags: higher precedence, nagle
>
> Datagrams (max data segment is 1460 bytes):
> Rcvd: 11 (out of order: 0), with
> data: 6, total data bytes: 124
> Sent: 10 (retransmit: 12), with data: 6, total data bytes: 124
> r1#
>
> =================== r2 config and debug =================
> r2#sh run
> Building configuration...
>
> Current configuration:
> !
> version 12.0
> service timestamps debug uptime
> service timestamps log uptime
> no service password-encryption
> !
> hostname r2
> !
> !
> ip subnet-zero
> !
> !
> !
> interface Loopback0
> ip address 2.2.2.2 255.255.255.0
> no ip directed-broadcast
> !
> interface Ethernet0
> no ip address
> no ip directed-broadcast
> shutdown
> !
> interface Serial0
> ip address 192.168.1.2 255.255.255.0
> no ip directed-broadcast
> !
> interface Serial1
> no ip address
> no ip directed-broadcast
> shutdown
> !
> router bgp 200
> network 2.2.2.2
> neighbor 192.168.1.1 remote-as 100
> !
> ip classless
> !
> !
> line con 0
> transport input none
> line aux 0
> line vty 0 4
> !
> end
>
> r2#
> r2#sh ip
> int b
> Interface IP-Address OK? Method Status
> Protocol
> Ethernet0 unassigned YES unset
> administratively down
> down
> Loopback0 2.2.2.2 YES manual up
> up
>
> Serial0 192.168.1.2 YES manual up
> up
>
> Serial1 unassigned YES unset
> administratively down
> down
> r2#sh ip ro
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile,
> B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter
> area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external
> type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E -
> EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * -
> candidate
> default
> U - per-user static route, o - ODR
>
> Gateway of last resort is not set
>
> 2.0.0.0/24 is subnetted, 1 subnets
> C 2.2.2.0 is directly connected, Loopback0
> C 192.168.1.0/24 is directly connected, Serial0
>
> r2#sh ip bgp
> {blank}
> r2#
>
> r2#sh ip bgp nei
> r2#sh ip bgp neighbors
> BGP neighbor is 192.168.1.1, remote AS 100, external link
> Index 1, Offset 0, Mask 0x2
> BGP version 4, remote router ID 1.1.1.1
> BGP state = Established, table version = 23, up for 00:00:17
> Last read 00:00:16, hold time is 180, keepalive interval is 60
> seconds
> Minimum time between advertisement runs is 30 seconds
> Received 3 messages, 0 notifications, 0 in queue
> Sent 3 messages, 0 notifications, 0 in queue
> Prefix advertised 0, suppressed 0, withdrawn 0
> Connections established 1; dropped 0
> Last reset never
> 0 accepted prefixes consume 0 bytes
> 0 history paths consume 0 bytes
> Conne
> ction state is ESTAB, I/O status: 1, unread input bytes: 0
> Local host: 192.168.1.2, Local port: 179
> Foreign host: 192.168.1.1, Foreign port: 11000
>
> Enqueued packets for retransmit: 0, input: 0 mis-ordered: 0 (0
> bytes)
>
> Event Timers (current time is 0xF02CC):
> Timer Starts Wakeups Next
> Retrans 4 0 0x0
> TimeWait 0 0 0x0
> AckHold 3 2 0x0
> SendWnd 0 0 0x0
>
> KeepAlive 0 0 0x0
> GiveUp 0 0 0x0
> PmtuAger 0 0 0x0
> DeadWait 0 0 0x0
>
> iss: 2897909981 snduna: 2897910049 sndnxt: 2897910049
> sndwnd: 16317
> irs: 278568032 rcvnxt: 278568100 rcvwnd: 16317
> delrcvwnd: 67
>
> SRTT: 710 ms, RTTO: 4442 ms, RTV: 1511 ms, KRTT: 0 ms
> minRTT: 16 ms, m
> axRTT: 300 ms, ACK hold: 200 ms
> Flags: passive open, nagle, gen tcbs
>
> Datagrams (max data segment is 1460 bytes):
> Rcvd: 6 (out of order: 0), with data: 3, total data bytes: 67
> Sent: 6 (retransmit: 0), with data: 3, total data bytes: 67
> r2#sh ip bgp neighbors ?
> A.B.C.D Neighbor to display information about
> <cr>
>
>
>
>
>
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:57:15 GMT-3