[f-nsp] MTU problem Brocade Chassis: MLXe 4-slot
Adrian Luchian <[email protected]>
| Newsgroups | gmane.network.nsp.foundry |
|---|---|
| Message-ID | <[email protected]> |
Hi,
We need to setup an L2 connection with MTU=1540 for a customer. After changing default-max-frame-size to 2000 and issue reload, we still can't get replies to icmp with size > 1500 bytes and df-bit set.
1510 Byte, DF not set = OK
=================================
hostname#ping x.x.x.x size 1510
Type escape sequence to abort.
Sending 5, 1510-byte ICMP Echos to x.x.x.x, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/7/8 ms
1511 Byte DF not set = not OK
=================================
hostname#ping x.x.x.x size 1511
Type escape sequence to abort.
Sending 5, 1511-byte ICMP Echos to x.x.x.x, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
1500 Byte, DF set = OK
=================================
hostname#ping x.x.x.x size 1500 df-bit
Type escape sequence to abort.
Sending 5, 1500-byte ICMP Echos to x.x.x.x, timeout is 2 seconds:
Packet sent with the DF bit set
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/6/8 ms
1501 Byte, DF set = not OK
=================================
hostname#ping x.x.x.x size 1501 df-bit
Type escape sequence to abort.
Sending 5, 1501-byte ICMP Echos to x.x.x.x, timeout is 2 seconds:
Packet sent with the DF bit set
.....
Success rate is 0 percent (0/5)
#show max-frame-size
Default max frame size for ETH : 2000
Default max frame size for POS : 4474
Slot 1 Port 1 Port 2 Port 3 Port 4
-------- -------- -------- --------
2000 2000 2000 2000
Port 5 Port 6 Port 7 Port 8
-------- -------- -------- --------
2000 2000 2000 2000
Port 9 Port 10 Port 11 Port 12
-------- -------- -------- --------
2000 2000 2000 2000
Port 13 Port 14 Port 15 Port 16
-------- -------- -------- --------
2000 2000 2000 2000
Port 17 Port 18 Port 19 Port 20
-------- -------- -------- --------
2000 2000 2000 2000
Slot 2 Port 1 Port 2 Port 3 Port 4
-------- -------- -------- --------
2000 2000 2000 2000
Port 5 Port 6 Port 7 Port 8
-------- -------- -------- --------
2000 2000 2000 2000
Port 9 Port 10 Port 11 Port 12
-------- -------- -------- --------
2000 2000 2000 2000
Port 13 Port 14 Port 15 Port 16
-------- -------- -------- --------
2000 2000 2000 2000
Port 17 Port 18 Port 19 Port 20
-------- -------- -------- --------
2000 2000 2000 2000
Slot 3 Port 1 Port 2 Port 3 Port 4
-------- -------- -------- --------
2000 2000 2000 2000
Slot 4 Port 1 Port 2 Port 3 Port 4
-------- -------- -------- --------
2000 2000 2000 2000
Port 5 Port 6 Port 7 Port 8
-------- -------- -------- --------
2000 2000 2000 2000
Port 9 Port 10 Port 11 Port 12
-------- -------- -------- --------
2000 2000 2000 2000
Port 13 Port 14 Port 15 Port 16
-------- -------- -------- --------
2000 2000 2000 2000
Port 17 Port 18 Port 19 Port 20
-------- -------- -------- --------
2000 2000 2000 2000
Is there anything else to be changed to accomplish this?
Best regards,
Adrian Luchian
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