Good evening everyone (and happy halloween)
Im having a bit of confusion regarding some L2TPv3 configuration.
I have 2 directly connected routers (via SRP5/0) are tunneling their fastethernet1/0 interfaces via L2TPv3.
R1:
...
pseudowire-class asdf
encapsulation l2tpv3
ip local interface SRP5/0
ip pmtu
!
interface FastEthernet1/0
no ip address
duplex full
xconnect 1.1.1.2 41 encapsulation l2tpv3 pw-class asdf
!
interface SRP5/0
ip address 1.1.1.1 255.255.255.248
!
...
R2:
...
pseudowire-class asdf
encapsulation l2tpv3
ip local interface SRP5/0
ip pmtu
!
interface FastEthernet1/0
no ip address
duplex full
xconnect 1.1.1.1 41 encapsulation l2tpv3 pw-class asdf
!
interface SRP5/0
ip address 1.1.1.2 255.255.255.248
!
...
The interfaces have the appropriate MTU:
Router# show int SRP5/0 | I MTU
MTU 4470 bytes, BW 622000 Kbit, DLY 100 usec,
Router# show int fast1/0 | I MTU
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
When i ping from the switches on either end of fa1/0:
Switch#ping 2.2.2.2 size 1480
Sending 5, 1480-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/4 ms
Switch#ping 2.2.2.2 size 1481
Sending 5, 1481-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Switch#
It doesnt look like any fragmentation should be necessary. There should be a 1500 byte (or larger) path between the two switches even WITH l2tpv3 overhead.
Can anybody help me figure out whats going wrong with this setup?
Thanks.