strange on BGP and ospf

From: Mansu Kim (mansukim@dreamx.net)
Date: Thu Aug 10 2000 - 21:39:25 EDT



Dear all,

I have a problem with bgp and ospf, anybody help me?
Following is my configuration,
[router1(2xx.xxx.4.1)]-----[ethernet switch]-----[(2xx.xxx.4.22)rotuer2]

the problem is I setup bgp between router1 and router2,
but bgp state is stay "idle" so I insert network statement to ospf routing,
than it change state to "active" then bgp connection workting.

router1's basic status and configuraiton
-----begin
router1#ping 2xx.xxx.4.22

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2xx.xxx.4.22, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
router1#sh ip ro 2xx.xxx.4.22
Routing entry for 2xx.xxx.4.0/27
  Known via "connected", distance 0, metric 0 (connected, via interface)
  Redistributing via ospf 9xxx
  Routing Descriptor Blocks:
  * directly connected, via GigabitEthernet2/0
      Route metric is 0, traffic share count is 1
router1#sh ip arp 2xx.xxx.4.22
Protocol Address Age (min) Hardware Addr Type Interface
Internet 2xx.xxx.4.22 61 00b0.4a68.6480 ARPA GigabitEthernet2/0

router1#sh ip int b
Interface IP-Address OK? Method Status Protocol
Ethernet0 unassigned YES unset administratively down down
GigabitEthernet2/0 2xx.xxx.4.1 YES manual up up
GigabitEthernet4/0 2xx.xxx.166.74 YES NVRAM up up
GigabitEthernet5/0 2xx.xxx.166.10 YES NVRAM up up
!!interface configuration
interface GigabitEthernet2/0
 ip address 2xx.xxx.4.1 255.255.255.224
 no ip directed-broadcast
 ip route-cache flow
 no negotiation auto
 no cdp enable

!!bgp configuration>>>
 neighbor 2xx.xxx.4.22 remote-as 4xxx
 neighbor 2xx.xxx.4.22 description now
 neighbor 2xx.xxx.4.22 update-source GigabitEthernet2/0

!!ospf configuration>>>
router ospf 9xxx
 redistribute connected metric 1 metric-type 1 subnets
 network 2xx.xxx.166.0 0.0.0.63 area 0
 network 2xx.xxx.166.64 0.0.0.63 area 0
-----end
-----begin router2 config and status
interface GigabitEthernet4/0
 ip address 2xx.xxx.4.22 255.255.255.224
 no ip redirects
 no ip directed-broadcast
 load-interval 30
 no negotiation auto
router bgp 4xxx
 no synchronization
 neighbor 2xx.xxx.4.1 remote-as 9xxx
 
and status>>>

router2#sh ip route 211.2 110.4.0
Routing entry for 211.110.4.0/27, 1 known subnets
  Attached (1 connections)
C 211.110.4.0 is directly connected, GigabitEthernet4/0


-----end

before I add "211.110.4.0/27" to ospf network.
-----begin
router1#sh ip bgp sum
2xx.xxx.4.22 4 4xxx 0 0 0 0 0 never Idle
2xx.xxx.4.26 4 3xxx 4134 3722 11753450 0 0 2d13h 198
router1# sh ip bgp ne 2xx.xxx.4.22
BGP neighbor is 2xx.xxx.4.22, remote AS 4xxx, external link
 Description: now
 Index 12, Offset 1, Mask 0x10
  BGP version 4, remote router ID 0.0.0.0
  BGP state = Idle, table version = 0
  Last read 00:00:01, last send never
  Hold time 180, keepalive interval 60 seconds
  Neighbor NLRI negotiation:
    Configured for unicast routes only
  Minimum time between advertisement runs is 30 seconds
  Received 0 messages, 0 notifications, 0 in queue
  Sent 0 messages, 0 notifications, 0 in queue
  Prefix advertised 0, suppressed 0, withdrawn 0
  Route refresh request: received 0, sent 0
  Inbound path policy configured
  Outbound path policy configured
  Route map for incoming advertisements is nowcom
  Route map for outgoing advertisements is thrunet
  Connections established 0; dropped 0
  Last reset never
  Number of unicast/multicast prefixes received 0/0
  External BGP neighbor not directly connected.
  No active TCP connection
-----end

after I add "211.110.4.0/27" to ospf network.

-----begin
router ospf 9xxx
 redistribute connected metric 1 metric-type 1 subnets
 network 2xx.xxx.66.0 0.0.0.63 area 0
 network 2xx.xxx.66.64 0.0.0.63 area 0
 network 2xx.xxx.4.0 0.0.0.31 area 0
 
router1#sh ip ro 2xx.xxx.4.22
Routing entry for 2xx.xxx.4.0/27
  Known via "connected", distance 0, metric 0 (connected, via interface)
  Redistributing via ospf 9277
  Routing Descriptor Blocks:
  * directly connected, via GigabitEthernet2/0
      Route metric is 0, traffic share count is 1
-----end

status was changed to
-----begin
2xx.xxx.4.22 4 4xxx 5 17 11756500 0 0 00:00:55 6
2xx.xxx.4.26 4 3xxx 4144 3731 11756536 0 0 2d13h 198

router1#sh ip bgp ne 2xx.xxx.4.22
BGP neighbor is 2xx.xxx.4.22, remote AS 4xxx, external link
 Description: now
 Index 12, Offset 1, Mask 0x10
  BGP version 4, remote router ID 2xx.xxx.xxx.xxx
  BGP state = Established, table version = 11756809, up for 00:01:24
  Last read 00:00:23, last send 00:00:21
  Hold time 180, keepalive interval 60 seconds
  Neighbor NLRI negotiation:
    Configured for unicast routes only
    Peer negotiated unicast routes only
    Exchanging unicast routes only
  Received route refresh capability from peer
  Minimum time between advertisement runs is 30 seconds
  Received 6 messages, 0 notifications, 0 in queue
  Sent 18 messages, 0 notifications, 0 in queue
  Prefix advertised 47, suppressed 0, withdrawn 0
  Route refresh request: received 0, sent 0
  Inbound path policy configured
  Outbound path policy configured
  Route map for incoming advertisements is nowcom
  Route map for outgoing advertisements is thrunet
  Connections established 1; dropped 0
  Last reset never
  Number of unicast/multicast prefixes received 6/0
Connection state is ESTAB, I/O status: 1, unread input bytes: 0
Local host: 2xx.xxx.4.1, Local port: 23908
Foreign host: 2xx.xxx.4.22, Foreign port: 179

Enqueued packets for retransmit: 0, input: 0 mis-ordered: 0 (0 bytes)

Event Timers (current time is 0xE53A9DEC):
Timer Starts Wakeups Next
Retrans 6 0 0x0
TimeWait 0 0 0x0
AckHold 5 4 0x0
SendWnd 0 0 0x0
KeepAlive 0 0 0x0
GiveUp 0 0 0x0
PmtuAger 0 0 0x0
DeadWait 0 0 0x0

iss: 1682743120 snduna: 1682744101 sndnxt: 1682744101 sndwnd: 16072
irs: 3962771998 rcvnxt: 3962772222 rcvwnd: 16161 delrcvwnd: 223

SRTT: 615 ms, RTTO: 4260 ms, RTV: 1515 ms, KRTT: 0 ms
minRTT: 0 ms, maxRTT: 312 ms, ACK hold: 200 ms
Flags: higher precedence, nagle

Datagrams (max data segment is 536 bytes):
Rcvd: 11 (out of order: 0), with data: 5, total data bytes: 223
Sent: 12 (retransmit: 0), with data: 6, total data bytes: 980
-----end

TIA

-mansu kim



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