Re: [uanog] Использование L2TP на 7600 ...

Yury Yaroshevsky пишет:

Добрый вечер.

Использует ли у себя кто-нибудь на 7600 L2TPv3 ? Посоветуйте что еще сделать мне в ситуации описанной ниже для того что бы выяснить в чем может быть проблема.

Есть необходимость в организации L2TPv3 туннелей между 7600 и 18xx, 28xx.

Настраиваю туннели следующим образом:

на 7600:

interface Loopback77 ip address a.a.a.a 255.255.255.255

pseudowire-class PW-L2TP-TEST encapsulation l2tpv3 ip local interface Loopback77

interface GigabitEthernet3/0/5.36 encapsulation dot1Q 933 no ip redirects no ip proxy-arp xconnect b.b.b.b 1333 pw-class PW-L2TP-TEST

На 2811:

interface Loopback77 ip address b.b.b.b 255.255.255.255

pseudowire-class PW-L2TP-TEST encapsulation l2tpv3 ip local interface Loopback77

interface Fa0/1.16 encapsulation dot1Q 1333 no ip redirects no ip proxy-arp xconnect a.a.a.a 1333 pw-class PW-L2TP-TEST

Туннели не поднимаются:

Это состояние на 7600 :

a.a.a.a#sh l2tun tunnel all

L2TP Tunnel Information Total tunnels 1 sessions 1

Tunnel id 675875571 is down, remote id is 48161, 1 active sessions ^^^^^^^^^ ^^^^^ Remotely initiated tunnel Tunnel state is Wt-SCCCN, time since change 00:01:46 ^^^^^^^ Tunnel transport is IP (L2TP) (115) Remote tunnel name is b.b.b.b Internet Address b.b.b.b, port 0 Local tunnel name is a.a.a.a Internet Address a.a.a.a, port 0 L2TP class for tunnel is l2tp_default_class Counters, taking last clear into account: 0 packets sent, 0 received 0 bytes sent, 0 received Last clearing of counters never Counters, ignoring last clear: 0 packets sent, 0 received 0 bytes sent, 0 received Control Ns 1, Nr 1 Local RWS 1024 (default), Remote RWS 1024 (max) Control channel Congestion Control is enabled Congestion Window size, Cwnd 1 Slow Start threshold, Ssthresh 2 Mode of operation is Slow Start Retransmission time 8, max 8 seconds Unsent queuesize 0, max 0 Resend queuesize 1, max 1 Total resends 15, ZLB ACKs sent 0 Total peer authentication failures 0 Current no session pak queue check 0 of 5 Retransmit time distribution: 0 0 1 0 1 0 0 0 13 Control message authentication is disabled

Это состояние на 2811 :

b.b.b.b#show l2tun tunnel all L2TP Tunnel Information Total tunnels 1 sessions 1

Tunnel id 48161 is up, remote id is 2803, 1 active sessions ^^^^^ ^^^^ Locally initiated tunnel Tunnel state is established, time since change 00:01:45 ^^^^^^^^^^^ Tunnel transport is IP (L2TP) (115) Remote tunnel name is a.a.a.a Internet Address a.a.a.a., port 0 Local tunnel name is b.b.b.b Internet Address b.b.b.b, port 0 L2TP class for tunnel is l2tp_default_class Counters, taking last clear into account: 0 packets sent, 0 received 0 bytes sent, 0 received Last clearing of counters never Counters, ignoring last clear: 0 packets sent, 0 received 0 bytes sent, 0 received Control Ns 3, Nr 1 Local RWS 1024 (default), Remote RWS 1024 (max) Control channel Congestion Control is enabled Congestion Window size, Cwnd 1 Slow Start threshold, Ssthresh 2 Mode of operation is Slow Start Retransmission time 8, max 8 seconds Unsent queuesize 0, max 0 Resend queuesize 2, max 2 Total resends 30, ZLB ACKs sent 14 Total peer authentication failures 0 Current no session pak queue check 0 of 5 Retransmit time distribution: 0 0 1 0 1 0 0 0 13 Control message authentication is disabled

Смущает следующее:

1) Несовпадение Tunnel id (см. выше) 2) 2811 считает туннель поднятым, в отличии 7600.

После включения debug l2tp event вижу следующее:

7600:

Oct 5 20:09:43.733 EEST: L2X tnl 022EF:________: Create logical tunnel Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:________: Create tunnel Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:________: version set to Cisco-V3 Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:________: remote ip set to b.b.b.b Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:________: local ip set to a.a.a.a. Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:EDD4C179: FSM-CC ev Rx-SCCRQ Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:EDD4C179: FSM-CC Idle->Proc-SCCRQ Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:EDD4C179: FSM-CC do Rx-SCCRQ Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:EDD4C179: class name l2tp_default_class Oct 5 20:09:43.733 EEST: L2TP _____:________: Check for existing cc Oct 5 20:09:43.733 EEST: L2TP _____:________: a.a.a.a.<->b.b.b.b Oct 5 20:09:43.733 EEST: L2TP _____:________: and peer router id: b.b.b.b Oct 5 20:09:43.733 EEST: L2TP _____:________: and peer hostname: b.b.b.b Oct 5 20:09:43.733 EEST: L2TP _____:________: and version: V3 Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:EDD4C179: Tie: 50927E8AE6B12703 vs outgoing Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: Tie: FBCEE33AFC5702E3 Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:EDD4C179: Tie: Peer wins; tear down ours 5956132A Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: FSM: outbound tunnel lost tie break Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: Shutting down tunnel Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: With 1 session Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: Result Code Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: Control channel already exists Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: Error Code Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: No error Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: Vendor Error Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: None Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: Optional Message Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: "FSM: outbound tunnel lost tie break" Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: FSM-CC ev Session-Disc Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: FSM-CC in Wt-SCCRP Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: FSM-CC do Session-Disc-Wait Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: Session count now 0 Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: XCONNECT Session count now 0 Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: FSM-CC ev Shut Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: FSM-CC Wt-SCCRP->Wt-STOPACK Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:5956132A: FSM-CC do Tx-StopCCN-Error Oct 5 20:09:43.733 EEST: L2TP 000F8:_____:________: Session detached Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC ev Session-Conn Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC in Proc-SCCRQ Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC do Session-Conn-Wait Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: Session count now 1 Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: XCONNECT Session count now 1 Oct 5 20:09:43.733 EEST: L2TP 000F8:012EE:00001AD8: Session attached Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:5956132A: FSM-CC ev Shut Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:5956132A: FSM-CC in Wt-STOPACK Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:5956132A: FSM-CC do Shutnow Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:5956132A: FSM-CC ev Shut-Comp Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:5956132A: FSM-CC Wt-STOPACK->Dead Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:5956132A: FSM-CC do Shutdown-Completed Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:5956132A: Control channel down Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:5956132A: a.a.a.a.<->b.b.b.b Oct 5 20:09:43.733 EEST: L2TP tnl 022EF:5956132A: Destroying tunnel Oct 5 20:09:43.733 EEST: L2X tnl 022EF:________: Destroying logical tunnel Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC ev SCCRQ-OK Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC Proc-SCCRQ->Wt-SCCCN Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC do Tx-SCCRP Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: Open sock a.a.a.a.:0->b.b.b.b:0 Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC ev Sock-Ready Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC in Wt-SCCCN Oct 5 20:09:43.733 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC do Ignore-Sock-Up Oct 5 20:09:44.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:09:46.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:09:50.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:09:58.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:10:06.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:10:14.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:10:22.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:10:30.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:10:38.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:10:46.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:10:54.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:11:02.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:11:10.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:11:18.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:11:26.733 EEST: L2TP tnl 012EE:EDD4C179: O Resend SCCRP, flg TLS, ver 3, len 182 Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Shutting down tunnel Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: With 1 session Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Result Code Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Request to clear control connection Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Error Code Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Vendor specific Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Vendor Error Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Tunnel shut Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Optional Message Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: "Too many retransmits to b.b.b.b" Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC ev Shut Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC Wt-SCCCN->Wt-STOPACK Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC do Tx-StopCCN-Error Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: FSM-Sn ev CC-Down Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: FSM-Sn Wt-CC->Idle Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: FSM-Sn do CC-Down Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Shutting down session Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Result Code Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Call disconnected, refer to error msg (2) Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Error Code Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Vendor specific (6) Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Vendor Error Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Tunnel shut (1) Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Optional Message Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: "Too many retransmits to b.b.b.b" Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: FSM-Sn ev Shut Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: FSM-Sn Idle->Dead Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: FSM-Sn do Destroy Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Session down Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: a.a.a.a.<->b.b.b.b Oct 5 20:11:34.734 EEST: L2TP 000F8:012EE:00001AD8: Destroying session Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC ev Session-Disc Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC in Wt-STOPACK Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: FSM-CC do Session-Disc-Shut Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: Session count now 0 Oct 5 20:11:34.734 EEST: L2TP tnl 012EE:EDD4C179: XCONNECT Session count now 0

2811:

Oct 5 20:09:43.983 EEST: L2X tnl 4361 :_____: Create logical tunnel Oct 5 20:09:43.983 EEST: L2TP tnl 4361 :_____: Create tunnel Oct 5 20:09:43.983 EEST: L2TP tnl 4361 :_____: version set to Cisco-V3 Oct 5 20:09:43.983 EEST: L2TP tnl 4361 :_____: remote ip set to a.a.a.a Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :_____: local ip set to b.b.b.b Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :59882: class name l2tp_default_class Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :59882: FSM-CC ev Session-Conn Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :59882: FSM-CC Idle->Wt-Sock Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :59882: FSM-CC do Session-Conn-Sock Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :59882: Session count now 1 Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :59882: XCONNECT Session count now 1 Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :59882: Open sock b.b.b.b:0->a.a.a.a:0 Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :59882: FSM-CC ev Sock-Ready Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :59882: FSM-CC Wt-Sock->Wt-SCCRP Oct 5 20:09:43.987 EEST: L2TP tnl 4361 :59882: FSM-CC do Tx-SCCRQ Oct 5 20:09:43.991 EEST: L2TP 21:4361 :42931: Session attached Oct 5 20:09:43.991 EEST: L2TP 21:4361 :42931: Oct 5 20:09:43.991 EEST: L2TP 21:4361 :42931: FSM-Sn ev DP-Setup Oct 5 20:09:43.991 EEST: L2TP 21:4361 :42931: FSM-Sn in Wt-CC Oct 5 20:09:43.991 EEST: L2TP 21:4361 :42931: FSM-Sn do Ignore-DP-Setup Oct 5 20:09:43.991 EEST: L2TP 21:4361 :42931: Local AC is now UP Oct 5 20:09:43.991 EEST: L2TP 21:4361 :42931: Oct 5 20:09:43.991 EEST: L2TP 21:4361 :42931: FSM-Sn ev Local-Up Oct 5 20:09:43.991 EEST: L2TP 21:4361 :42931: FSM-Sn in Wt-CC Oct 5 20:09:43.991 EEST: L2TP 21:4361 :42931: FSM-Sn do Noop-Local-State-Change Oct 5 20:09:43.995 EEST: L2TP tnl 4361 :59882: FSM-CC ev Rx-SCCRP Oct 5 20:09:43.995 EEST: L2TP tnl 4361 :59882: FSM-CC Wt-SCCRP->Proc-SCCRP Oct 5 20:09:43.995 EEST: L2TP tnl 4361 :59882: FSM-CC do Rx-SCCRP Oct 5 20:09:43.995 EEST: L2TP tnl 4361 :59882: FSM-CC ev SCCRP-OK Oct 5 20:09:43.995 EEST: L2TP tnl 4361 :59882: FSM-CC Proc-SCCRP->established Oct 5 20:09:43.995 EEST: L2TP tnl 4361 :59882: FSM-CC do Tx-SCCCN Oct 5 20:09:43.999 EEST: L2TP tnl 4361 :59882: Control channel up Oct 5 20:09:43.999 EEST: L2TP tnl 4361 :59882: b.b.b.b<->a.a.a.a Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: FSM-Sn ev CC-Up Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: FSM-Sn Wt-CC->Wt-Sock Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: FSM-Sn do CC-Up Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: Session needs to have: Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: V2 V3 Eth VLAN HDLC PPP FR-DLCI Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: ATM-PORT ATM-VP ATM-VC-CELL IP Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: Tie-Breaker Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: Peer cc can do: Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: V3 Eth VLAN HDLC PPP FR-DLCI Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: ATM-PORT ATM-VP ATM-VC-CELL IP Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: Tie-Breaker Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: Open sock b.b.b.b:0->a.a.a.a:0 Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: FSM-Sn ev Sock-Ready Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: FSM-Sn Wt-Sock->Wt-Tx-ICRQ Oct 5 20:09:43.999 EEST: L2TP 21:4361 :42931: FSM-Sn do Tx-ICRQ-Local-Check Oct 5 20:09:44.003 EEST: L2TP 21:4361 :42931: FSM-Sn ev Local-Cont Oct 5 20:09:44.003 EEST: L2TP 21:4361 :42931: FSM-Sn Wt-Tx-ICRQ->Wt-Rx-ICRP Oct 5 20:09:44.003 EEST: L2TP 21:4361 :42931: FSM-Sn do Tx-ICRQ Oct 5 20:09:44.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:09:44.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:09:46.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:09:46.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:09:50.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:09:50.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:09:58.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:09:58.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:10:06.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:10:06.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:10:14.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:10:14.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:10:22.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:10:22.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:10:30.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:10:30.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:10:38.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:10:38.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:10:46.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:10:46.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:10:54.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:10:54.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:11:02.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:11:02.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:11:10.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:11:10.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:11:18.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:11:18.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:11:26.999 EEST: L2TP tnl 4361 :59882: O Resend SCCCN, flg TLS, ver 3, len 20 Oct 5 20:11:26.999 EEST: L2TP tnl 4361 :59882: O Resend ICRQ, flg TLS, ver 3, len 144 Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: FSM-CC ev Rx-StopCCN Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: FSM-CC in established Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: FSM-CC do Rx-StopCCN Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: Shutting down tunnel Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: With 1 session Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: Result Code Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: Request to clear control connection Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: Error Code Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: Vendor specific Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: Vendor Error Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: Tunnel shut Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: Optional Message Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: "Too many retransmits to b.b.b.b" Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: FSM-CC ev Shut-Now Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: FSM-CC established->Wt-STOPACK Oct 5 20:11:34.995 EEST: L2TP tnl 4361 :59882: FSM-CC do Shutnow Oct 5 20:11:34.995 EEST: L2TP 21:4361 :42931: FSM-Sn ev CC-Down Oct 5 20:11:34.995 EEST: L2TP 21:4361 :42931: FSM-Sn Wt-Rx-ICRP->Idle Oct 5 20:11:34.995 EEST: L2TP 21:4361 :42931: FSM-Sn do CC-Down-Retry Oct 5 20:11:34.995 EEST: L2TP 21:4361 :42931: Retry on new cc Oct 5 20:11:34.999 EEST: L2TP tnl 4361 :59882: FSM-CC ev Session-Disc Oct 5 20:11:34.999 EEST: L2TP tnl 4361 :59882: FSM-CC in Wt-STOPACK Oct 5 20:11:34.999 EEST: L2TP tnl 4361 :59882: FSM-CC do Session-Disc-Shut Oct 5 20:11:34.999 EEST: L2TP tnl 4361 :59882: Session count now 0 Oct 5 20:11:34.999 EEST: L2TP tnl 4361 :59882: XCONNECT Session count now 0

Чаще всего разрыв идет по запросу От7600 с Optional Message : Too many retransmits to b.b.b.b

IOS на 7600 уже менял. Сейчас стоит SRC2.

Что еще можно покрутить?

В догонку : причина наверное в том, что от инициатора установления туннеля не доходят SCCCN (Start-Control-Connection-Connected) пакеты. Но как понять куда оди деваются? BTW, а работает ли вообще L2TPv3 на 7600 ?