MTU problem with power connect 6224

Hello

I try to use 2 6224 switches QinQ purposes. The two switches are connected via links XG 2, for reasons of redundancy. The two switches are:

interface ethernet 1/g11
Auto mode channel-group 1
«Cisco links» description
output
!
interface ethernet 1/g12
Auto mode channel-group 1
«Cisco links» description
output
!
interface ethernet 1/g13
Auto mode channel-group 2
output
!
interface ethernet 1/g14
Auto mode channel-group 2
output

.....

interface ethernet 1/xg1

MTU 9216
switchport mode trunk
switchport trunk allowed vlan add 101 299
switchport trunk allowed vlan remove 1
dvlan-tunnel mode
output
!
interface ethernet 1/xg2
MTU 9216
switchport mode trunk
switchport trunk allowed vlan add 102
switchport trunk allowed vlan remove 1
dvlan-tunnel mode
output

The idea is to use ports 11-14 to connecto to cisco switches, which are configured in trunk mode:

Po           xg             Po

/--- |===|-----|===|---\

Cisco | Reference Dell |       | Reference Dell |     Cisco

\--- |===| ----|===|---/

XG in. in.

The two drivers communicate with each other through the vlan 666, which is sent by tunnel via VLAN 102 and 102 in 6224. Catalysts also use rapid-pvst to avoid loops. Cisco (s) I have ips 1.1.1.1 and 1.1.1.2. If I am controlled:

Switch to size #ping 1.1.1.2 1496

Type to abort escape sequence.
Send 5, echoes ICMP 1496 bytes to 1.1.1.2, time-out is 2 seconds:
!!!!!
Success rate is 100 per cent (5/5), round-trip min/avg/max = 1/1/1 ms

If I increase the packet size, it will not work:

Switch to size #ping 1.1.1.2 1497

Type to abort escape sequence.
Send 5, echoes ICMP 1497 bytes to 1.1.1.2, time-out is 2 seconds:
.....
Success rate is 0% (0/5)

If the catalysts are directly connected, it works. Also, I used other 6224 2 ports to connect 2 PCs with plu MTU, and it did not work, worked when the computers were connected directly.

Version of Dell #show

Descriptions of images

Image1: default image
Image2:

Images currently available on Flash

--------------------------------------------------------------------
Unit image1 image2 current-next active
--------------------------------------------------------------------

1 2.1.0.13 2.0.0.12 image1 image1

Image2 served before, I've updated to 2.1.0.13 only today, hoping that would solve the problem. Thank you in advence, I really hope to solve this "mystery".

Message edited by alex.dragoi on 08/08/2008 16:49

Tags: Dell Switches

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