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L2TPV3 tunnel

Здравствуйте! Есть проблема. Между 2-мя роутерами Cisco 7609 сделали туннель L2tpv3. Туннель поднялся, но пакеты через него не ходят.


sh l2tun session all


L2TP Session Information Total tunnels 1 sessions 1


Session id 7432 is up, tunnel id 3925069788

Remote session id is 5075, remote tunnel id 1343098550

Locally initiated session

Unique ID is 12

Session Layer 2 circuit, type is Ethernet Vlan, name is Vlan18:18

Session vcid is 16

Circuit state is UP

Local circuit state is UP

Remote circuit state is UP

Call serial number is 1115500011

Remote tunnel name is Router1

Internet address is x.x.x.x

Local tunnel name is Router2

Internet address is x.x.x.x

IP protocol 115

Session is L2TP signaled

Session state is established, time since change 00:18:43

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

Receive packets dropped:

out-of-order: 0

total: 0

Send packets dropped:

exceeded session MTU: 0

total: 0

DF bit off, ToS reflect disabled, ToS value 0, TTL value 255

Sending UDP checksums are disabled

Received UDP checksums are verified

Session PMTU enabled, path MTU is not known

No session cookie information available

FS cached header information:

encap size = 24 bytes

45000014 00000000 FF734E59 D913DBFE

D913DEF7 000013D3

Sequencing is off

Conditional debugging is disabled



Вот конфиг одного из роутеров:


l2tp-class Router2-Router1


password 7 xxxxxxxxxxxxxxxxxxx

retransmit initial retries 30


pseudowire-class Router2-Router1

encapsulation l2tpv3

protocol l2tpv3 Router2-Router1

ip local interface Loopback0

ip pmtu


interface Loopback0

ip address x.x.x.x


interface Vlan18

no ip address

xconnect y.y.y.y 18 pw-class Router2-Router1



На втором роутере аналогично. В чем проблема??? ПРобовали пинги разного размера, ничего не проходит......

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Конфиг нормальный, только я не прописывал

retransmit initial retries 30


ip pmtu

работает куча таких туннелей, только строятся между сабинтерфейсами на 38хх и 72хх.

Хотелось бы посмотреть на топологию с обоих сторон на уровне vlan и ip, хотя бы в общих чертах.


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насколько я понял туннели l2tpv3 работать не будут. они работают только на ES+ и SIP 400 картах, к сожалению. а у нас их нету :(

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