[c-nsp] One-way traffic using L2TPv3

[Church, Charles]

Hey all,

	Just for the record, it seems my issue was tied into using an xconnect statement on a port on a 16 port ESW module, even though there was a 'no switchport' on there.  Upgrading to 12.4(25b) didn't fix it, in fact, it made it worse, no traffic in either direction.  But when I moved the xconnect to the built-in ethernet port, and used subints for VLANs, no issue, worked like it should.

P.S.  Throughput seems pretty good.  Random frame sizes (even dist) from 600 bytes to 1400 bytes (avoiding any fragmentation) had 95 mbit bi-directionally at 90% CPU on the 3660.  All interrupt traffic.  

Chuck 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Church, Charles
Sent: Wednesday, November 18, 2009 5:05 PM
To: nsp-cisco
Subject: [c-nsp] One-way traffic using L2TPv3

Anyone,

 

                Labbing up L2TPv3 on a couple routers back to back, having some issues with just one way traffic.  Topology looks like this:

 

Ixia(port3)----Fa1/8(3660)Fa0/0----Fa0/0(3660)Fa1/8----(port4)Ixia

 

Both Ixia ports are sending traffic, but only port4 is receiving any traffic.  Port Fa1/8 on the right 3660 shows packets coming in, but 'sh l2tun sess pack' on the right 3660 doesn't show any packets in, which the fa0/0 interface counters confirm.  Any idea what would cause this one-way behavior?  When I put the 4 ports in a bridge groups (Ieee), traffic flowed as expected, so I know the Ixia isn't to blame.  Relevant config:

 

 R3 (left)

 

l2tp-class testclass

 authentication

 password 7 05080F1C2243

!

pseudowire-class test-pclass

 encapsulation l2tpv3

 protocol l2tpv3 testclass

 ip local interface FastEthernet0/0

 ip pmtu

!

!

interface FastEthernet0/0

 ip address 10.0.0.1 255.255.255.252

 ip flow ingress

 duplex auto

 speed auto

!

!

interface FastEthernet1/8

 no switchport

 no ip address

 no cdp enable

 xconnect 10.0.0.2 400 encapsulation l2tpv3 pw-class test-pclass

!

 

R4(right)

 

l2tp-class testclass

 authentication

 password 7 05080F1C2243

!

pseudowire-class test-pclass

 encapsulation l2tpv3

 protocol l2tpv3 testclass

 ip local interface FastEthernet0/0

 ip pmtu

!

!

interface FastEthernet0/0

 ip address 10.0.0.2 255.255.255.252

 ip flow ingress

 duplex auto

 speed auto

 hold-queue 150 out

!

!

interface FastEthernet1/8

 no switchport

 no ip address

 no cdp enable

 xconnect 10.0.0.1 400 encapsulation l2tpv3 pw-class test-pclass

!

 

Any ideas?    IOS is 12.4(10) IK9S , platform is 3660.

 

Thanks,

 

Chuck