On Jan 16, 2008 11:43 AM, Stuart Henderson <[EMAIL PROTECTED]> wrote:
> On 2008/01/16 11:17, Eduardo Meyer wrote:
> > I am setting up OpenBGP for the first time in replacement to Cisco.
> > However, I am having some troubles which I could not realize the
> > reason myself, so I
>
> > holdtime 4
>
> can your peers keep up with that? it's rather low.
>
> > Local host: 201.87.225.16, Local port: 61684
> > Remote host: 200.184.196.18, Remote port: 179
>
> is this the correct local-address?
>
> "tcpdump -nvvs1500 -i<interface> port 179" might give more clues.
>
>
I have lowered holdtime for testing purposes only. With default value
the behavior is the same. I have just forced local-address to another
one, with "local-address 201.70.200.2" but still the same.
Here is the tcpdum output
22:39:40.566835 IP (tos 0xc0, ttl 4, id 9918, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.61409 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0x3ca1), 990673835:990673835(0) ack
1878726869 win 33304 <nop,nop,timestamp 105680141 22526977>
22:39:43.925328 IP (tos 0xc0, ttl 4, id 9930, offset 0, flags [DF],
proto: TCP (6), length: 64) 201.87.225.16.57856 > 200.184.196.18.179:
S, cksum 0x3766 (incorrect (-> 0xdc9c), 2171084445:2171084445(0) win
65535 <mss 1460,nop,wscale 1,nop,nop,timestamp 105683499 0,sackOK,eol>
22:39:43.933442 IP (tos 0xc0, ttl 63, id 2913, offset 0, flags [DF],
proto: TCP (6), length: 64) 200.184.196.18.179 > 201.87.225.16.57856:
S, cksum 0xb4d4 (correct), 1446395664:1446395664(0) ack 2171084446 win
16384 <mss 1460,nop,wscale 0,nop,nop,timestamp 22565145
105683499,sackOK,eol>
22:39:43.933508 IP (tos 0xc0, ttl 4, id 9933, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
., cksum 0x375a (incorrect (-> 0xb27e), 1:1(0) ack 1 win 33304
<nop,nop,timestamp 105683507 22565145>
22:39:43.933609 IP (tos 0xc0, ttl 4, id 9934, offset 0, flags [DF],
proto: TCP (6), length: 101) 201.87.225.16.57856 > 200.184.196.18.179:
P, cksum 0x378b (incorrect (-> 0x69a3), 1:50(49) ack 1 win 33304
<nop,nop,timestamp 105683507 22565145>: BGP, length: 49
Open Message (1), length: 49
Version 4, my AS 28660, Holdtime 90s, ID 201.87.224.253
Optional parameters, length: 20
Option Capabilities Advertisement (2), length: 6
Multiprotocol Extensions (1), length: 4
AFI IPv4 (1), SAFI Unicast (1)
0x0000: 0001 0001
Option Capabilities Advertisement (2), length: 2
Route Refresh (2), length: 0
Option Capabilities Advertisement (2), length: 6
Graceful Restart (64), length: 4
Restart Flags: [R], Restart Time 0s
0x0000: 8000 0000
22:39:43.939183 IP (tos 0xc0, ttl 63, id 2914, offset 0, flags [DF],
proto: TCP (6), length: 52) 200.184.196.18.179 > 201.87.225.16.57856:
F, cksum 0xf07e (correct), 1:1(0) ack 50 win 17376 <nop,nop,timestamp
22565151 105683507>
22:39:43.939207 IP (tos 0xc0, ttl 4, id 9936, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
., cksum 0x375a (incorrect (-> 0xb240), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105683513 22565151>
22:39:43.939229 IP (tos 0xc0, ttl 4, id 9937, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xb23f), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105683513 22565151>
22:39:44.163831 IP (tos 0xc0, ttl 4, id 9939, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xb15e), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105683738 22565151>
22:39:44.413831 IP (tos 0xc0, ttl 4, id 9945, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xb064), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105683988 22565151>
22:39:44.713829 IP (tos 0xc0, ttl 4, id 9946, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xaf38), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105684288 22565151>
22:39:45.113830 IP (tos 0xc0, ttl 4, id 9947, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xada8), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105684688 22565151>
22:39:45.713832 IP (tos 0xc0, ttl 4, id 9950, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xab50), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105685288 22565151>
22:39:46.489837 IP (tos 0xc0, ttl 4, id 9952, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xa848), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105686064 22565151>
22:39:47.841844 IP (tos 0xc0, ttl 4, id 9955, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xa300), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105687416 22565151>
22:39:50.345853 IP (tos 0xc0, ttl 4, id 9958, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum
0x3766 (incorrect (-> 0x9591), 3884765654:3884765654(0) win 65535 <mss
1460,nop,wscale 1,nop,nop,timestamp 105703752 0,sackOK,eol>
22:40:04.181058 IP (tos 0xc0, ttl 63, id 3265, offset 0, flags [DF],
proto: TCP (6), length: 64) 200.184.196.18.179 > 201.87.225.16.49296:
S, cksum 0xaf2f (correct), 729012562:729012562(0) ack 3884765655 win
16384 <mss 1460,nop,wscale 0,nop,nop,timestamp 22585395
105703752,sackOK,eol>
22:40:04.181092 IP (tos 0xc0, ttl 4, id 9966, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.49296 > 200.184.196.18.179:
., cksum 0x375a (incorrect (-> 0xacde), 1:1(0) ack 1 win 33304
<nop,nop,timestamp 105703755 22585395>
22:40:04.181266 IP (tos 0xc0, ttl 4, id 9967, offset 0, flags [DF],
proto: TCP (6), length: 101) 201.87.225.16.49296 > 200.184.196.18.179:
P, cksum 0x378b (incorrect (-> 0x645a), 1:50(49) ack 1 win 33304
<nop,nop,timestamp 105703755 22585395>: BGP, length: 49
Open Message (1), length: 49
Version 4, my AS 28660, Holdtime 3s, ID 201.87.224.253
Optional parameters, length: 20
Option Capabilities Advertisement (2), length: 6
Multiprotocol Extensions (1), length: 4
AFI IPv4 (1), SAFI Unicast (1)
0x0000: 0001 0001
Option Capabilities Advertisement (2), length: 2
Route Refresh (2), length: 0
Option Capabilities Advertisement (2), length: 6
Graceful Restart (64), length: 4
Restart Flags: [R], Restart Time 0s
0x0000: 8000 0000
22:40:04.186055 IP (tos 0xc0, ttl 63, id 3266, offset 0, flags [DF],
proto: TCP (6), length: 52) 200.184.196.18.179 > 201.87.225.16.49296:
F, cksum 0xeae0 (correct), 1:1(0) ack 50 win 17376 <nop,nop,timestamp
22585399 105703755>
22:40:04.186081 IP (tos 0xc0, ttl 4, id 9968, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.49296 > 200.184.196.18.179:
., cksum 0x375a (incorrect (-> 0xaca3), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105703760 22585399>
22:40:04.186100 IP (tos 0xc0, ttl 4, id 9969, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.49296 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xaca2), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105703760 22585399>
22:40:04.396916 IP (tos 0xc0, ttl 4, id 9974, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.49296 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xabcf), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105703971 22585399>
22:40:04.569912 IP (tos 0xc0, ttl 4, id 9975, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0x61a8), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105704144 22565151>
22:40:04.618912 IP (tos 0xc0, ttl 4, id 9976, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.49296 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xaaf1), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105704193 22585399>
22:40:04.862913 IP (tos 0xc0, ttl 4, id 9977, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.49296 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xa9fd), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105704437 22585399>
22:40:05.150914 IP (tos 0xc0, ttl 4, id 9978, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.49296 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xa8dd), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105704725 22585399>
22:40:05.526917 IP (tos 0xc0, ttl 4, id 9982, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.49296 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xa765), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105705101 22585399>
22:40:05.538403 IP (tos 0xc0, ttl 11, id 3282, offset 0, flags [DF],
proto: TCP (6), length: 52) 200.184.196.18.179 > 201.87.225.16.49296:
., cksum 0xe591 (correct), 2:2(0) ack 51 win 17375 <nop,nop,timestamp
22586753 105703760>
22:40:13.022964 IP (tos 0xc0, ttl 4, id 9986, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.61409 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0xbdd8), 0:0(0) ack 1 win 33304
<nop,nop,timestamp 105712597 22526977>
22:40:13.040775 IP (tos 0xc0, ttl 11, id 3615, offset 0, flags [DF],
proto: TCP (6), length: 52) 200.184.196.18.179 > 201.87.225.16.61409:
., cksum 0xfbf9 (correct), 1:1(0) ack 1 win 17375 <nop,nop,timestamp
22594256 105645342>
22:40:13.985954 IP (tos 0xc0, ttl 4, id 9988, offset 0, flags [DF],
proto: TCP (6), length: 52) 201.87.225.16.57856 > 200.184.196.18.179:
F, cksum 0x375a (incorrect (-> 0x3ce0), 50:50(0) ack 2 win 33304
<nop,nop,timestamp 105713560 22565151>
--
===========
Eduardo Meyer
