I am having a devil
of a time getting spanning-tree packets to work over a functional L2TPv3
tunnel. I can see arp, cdp, SSDP, and all sorts of other garbage traffic over
the link, DHCP works, Internet, the works.
However, if I
connect a catalyst switch on each end and send STP, I do not see the
spanning-tree packets on the remote end of the link.
I am using Cisco
800-series routers (cheating by reversing the Fe4 and Vlan1 ports) and as
stated, the L2TPv3 tunnel is reliable and functional, with the exception of
STP. Is there something fundamental I am missing? See below
configs;
SiteA:
======
l2tp-class
l2-dyn
authentication
hostname MTL
password 7
071B29495E08
cookie size 8
!
!
pseudowire-class
pw-dynamic
encapsulation l2tpv3
protocol l2tpv3 l2-dyn
ip local
interface Vlan1
!
!
!
interface FastEthernet4
no ip
address
duplex auto
speed auto
no cdp enable
xconnect 66.xxx.xxx.xxx 1
encapsulation l2tpv3 pw-class pw-dynamic
!
interface
Vlan1
ip address 66.xxx.xxx.xxx 255.255.255.192
no ip
proxy-arp
show l2tun session
all
L2TP Session
Information Total tunnels 1 sessions 1
Session id 61551 is
up, tunnel id 735
Remote session id is 21103, remote tunnel id 25982
Locally initiated session
Call serial number is 2414100001
Remote tunnel
name is SHE
Internet address is 66.xxx.xxx.21
Local tunnel name is
MTL
Internet address is 66.xxx.xxx.195
IP protocol 115
Session is
L2TP signaled
Session state is established, time since change 00:09:59
DF bit off, ToS reflect disabled, ToS value 0, TTL value 255
UDP checksums
are disabled
Session cookie information:
local cookie, size 8 bytes,
value CB 2A 48 48 59 BA 49 A5
remote cookie, size 8 bytes, value 0D F2 0A
CF 7A ED 2A B4
FS cached header information:
encap size = 32
bytes
45000014 00000000 FF73347F 429E81C3
42818015 0000526F
0DF20ACF 7AED2AB4
1327 Packets
sent, 12 received
119801 Bytes sent, 1295 received
Last clearing of
counters never
Counters, ignoring last clear:
1327 Packets sent, 12
received
119801 Bytes sent, 1295 received
Receive packets
dropped:
out-of-order: 0
total:
0
Send packets dropped:
exceeded session MTU: 0
total: 0
Sequencing is off
Conditional debugging is
disabled
Unique ID is 1
Session Layer 2 circuit, type is Ethernet, name
is FastEthernet4
Session vcid is 1
Circuit state is UP
Local
circuit state is UP
Remote circuit state is UP
SiteB:
=====
l2tp-class
l2-dyn
authentication
hostname SHE
password 7 14031A0E1C0
cookie
size 8
!
!
pseudowire-class
pw-dynamic
encapsulation l2tpv3
protocol l2tpv3 l2-dyn
ip local
interface Vlan1
!
!
interface
FastEthernet4
no ip address
duplex auto
speed auto
no cdp
enable
xconnect 66.xxx.xxx.195 1 encapsulation l2tpv3 pw-class
pw-dynamic
!
interface
Vlan1
ip address 66.xxx.xxx.21 255.255.255.0
no ip
proxy-arp
show l2tun session
all
L2TP Session
Information Total tunnels 1 sessions 1
Session id 21103 is
up, tunnel id 25982
Remote session id is 61551, remote tunnel id 735
Remotely initiated session
Call serial number is 15905
Remote tunnel name
is MTL
Internet address is 66.xxx.xxx.195
Local tunnel name is SHE
Internet address is 66.xxx.xxx.21
IP protocol 115
Session is L2TP
signaled
Session state is established, time since change 00:12:43
DF
bit off, ToS reflect disabled, ToS value 0, TTL value 255
UDP checksums are
disabled
Session cookie information:
local cookie, size 8 bytes,
value 0D F2 0A CF 7A ED 2A B4
remote cookie, size 8 bytes, value CB 2A 48
48 59 BA 49 A5
FS cached header information:
encap size = 32
bytes
45000014 00000000 FF73347F 42818015
429E81C3 0000F06F
CB2A4848 59BA49A5
14 Packets sent,
1607 received
1415 Bytes sent, 145299 received
Last clearing of
counters never
Counters, ignoring last clear:
14 Packets sent, 1607
received
1415 Bytes sent, 145299 received
Receive packets
dropped:
out-of-order: 0
total:
0
Send packets dropped:
exceeded session MTU: 0
total: 0
Sequencing is off
Conditional debugging is
disabled
Unique ID is 1
Session Layer 2 circuit, type is Ethernet, name
is FastEthernet4
Session vcid is 1
Circuit state is UP
Local
circuit state is UP
Remote circuit state is UP
Any
ideas?!
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