From: Tony Schaffran \(GS\) (groupstudy@cconlinelabs.com)
Date: Sun Feb 17 2008 - 13:35:59 ARST
I asked to see the configs for both sides yesterday morning.
It is strange that my email has not been posted yet.
Tony Schaffran
Network Analyst
CCIE #11071
CCNP, CCNA, CCDA,
NNCDS, NNCSS, CNE, MCSE
www.cconlinelabs.com
Your #1 choice for online Cisco rack rentals.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
M_A_Jones@DellTeam.com
Sent: Friday, February 15, 2008 8:15 AM
To: cristian.ionescu@omnilogic.ro; ccielab@groupstudy.com
Subject: RE: BGP - Connection refused by remote host
Looks like the remote router before peering is asking for MD5
authentication...Your local router is not using MD5 so the TCP session
is being tore down..
*Feb 14 11:33:31.259: BGP: 54.1.1.254 open active, local address
54.1.1.6
TCB45114344 created
*Feb 14 11:46:32.839: TCB45114344 setting property TCP_WINDOW_SIZE (0)
4511D1C8
*Feb 14 11:46:32.839: TCB45114344 setting property TCP_MD5KEY (5) 0 *Feb
14 11:46:32.839: TCB45114344 setting property TCP_TOS (11) 4511D1A8 *Feb
14 11:46:32.839: TCB45114344 setting property TCP_OUT_TTL (24) 46B25A2A
*Feb 14 11:46:32.839: TCP: Random local port generated 53511 *Feb 14
11:46:32.839: TCB45114344 bound to 54.1.1.6.53511 *Feb 14 11:46:32.839:
TCP: sending SYN, seq 664141347, ack 0 *Feb 14 11:46:32.839: TCP0:
Connection to 54.1.1.254:179, advertising MSS 1460 *Feb 14 11:46:32.839:
TCP0: state was CLOSED -> SYNSENT [53511 -> 54.1.1.254(179)] *Feb 14
11:46:32.839: TCP0: state was SYNSENT -> CLOSED [53511 ->
54.1.1.254(179)] *Feb 14 11:46:32.839: TCP0: bad seg from 54.1.1.254 --
closing
connection: port 53511 seq 0 ack 664141348 rcvnxt 0 rcvwnd 0 len 0 *Feb
14 11:46:32.843: TCP0: connection closed - remote sent RST *Feb 14
11:46:32.843: TCB 0x45114344 destroyed *Feb 14 11:33:31.259: BGP:
54.1.1.254 open failed: Connection refused by remote host, open active
delayed 29499ms (32000ms max, 28% jitter)
Michael Jones
Network Engineer
Global Network Operations
Dell Inc. | Information Technology
W. 512.723.3268 | C. 512.966.6908
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Cristian Ionescu
Sent: Thursday, February 14, 2008 6:40 AM
To: Cisco certification
Subject: BGP - Connection refused by remote host
Hi GS
I have a strange situation with a "simple" BGP peering session.
I have 2 router connected over FR in different AS-es and i want to
establish a peering session between them. Let's say i do not know the
config of BB.
AS100 - - - - - AS54
R6 <----------> BB
The config of R6 is:
R6#
interface Loopback0
ip address 150.1.6.6 255.255.255.0
!
interface Serial0/0/0
ip address 54.1.1.6 255.255.255.0
!
router bgp 100
no synchronization
bgp log-neighbor-changes
neighbor 54.1.1.254 remote-as 54
no auto-summary
!
BB is directly connected and the peer address is 54.1.1.254 (i have ping
to this address)
I get the following debug output:
*Feb 14 11:33:31.259: BGP: 54.1.1.254 open active, local address
54.1.1.6
TCB45114344 created
*Feb 14 11:46:32.839: TCB45114344 setting property TCP_WINDOW_SIZE (0)
4511D1C8
*Feb 14 11:46:32.839: TCB45114344 setting property TCP_MD5KEY (5) 0 *Feb
14 11:46:32.839: TCB45114344 setting property TCP_TOS (11) 4511D1A8 *Feb
14 11:46:32.839: TCB45114344 setting property TCP_OUT_TTL (24) 46B25A2A
*Feb 14 11:46:32.839: TCP: Random local port generated 53511 *Feb 14
11:46:32.839: TCB45114344 bound to 54.1.1.6.53511 *Feb 14 11:46:32.839:
TCP: sending SYN, seq 664141347, ack 0 *Feb 14 11:46:32.839: TCP0:
Connection to 54.1.1.254:179, advertising MSS 1460 *Feb 14 11:46:32.839:
TCP0: state was CLOSED -> SYNSENT [53511 -> 54.1.1.254(179)] *Feb 14
11:46:32.839: TCP0: state was SYNSENT -> CLOSED [53511 ->
54.1.1.254(179)] *Feb 14 11:46:32.839: TCP0: bad seg from 54.1.1.254 --
closing
connection: port 53511 seq 0 ack 664141348 rcvnxt 0 rcvwnd 0 len 0 *Feb
14 11:46:32.843: TCP0: connection closed - remote sent RST *Feb 14
11:46:32.843: TCB 0x45114344 destroyed *Feb 14 11:33:31.259: BGP:
54.1.1.254 open failed: Connection refused by remote host, open active
delayed 29499ms (32000ms max, 28% jitter)
Can u please tell me where is the problem? What is the cause of this
kind of error message?
Regards
Cristian Ionescu
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