Strannge situation with two SRW224G4 and one Cisco 2950-12

There is such scheme:

FreeBSD --> SRW224G4 --> SRW224G4 --> Cisco 2950-12 --> end user equipment at Fa0/2 of the 2950.

I have BSD router with configured vlan40 interface:

bash-3.00# ifconfig vlan40 vlan40: flags=8843 mtu 1500 inet 10.25.0.1 netmask 0xffffffc0 broadcast 10.25.0.63 ether 00:07:e9:0a:6e:83 media: Ethernet autoselect (1000baseTX ) status: active vlan: 40 parent interface: em1 bash-3.00#

The em1 card of the BSD is connected into trunk port g3 of the first LinkSys SRW224G4 switch as described at scheme. And then this trunk forwarding via another trunk port to second SRW224G4 and then to Cisco

2950 switch ( Fa0/1 is a trunk port also).

vlan40 is described in VLAN DB of all three switches. The problem looks strange. I can't see MAC ( can't ping) of the user equipment at Fa0/2 of the 2950 switch. But I can see equipment when I connect it directly to trunk port of the second LinkSys switch without using of Cisco switch. So I suspect that problem is in Cisco switch configuration or IOS.

Here are examples of my configs from all three switches: krrt-24# sh vlan

Vlan Name Ports Type Authorization

---- ----------------- --------------------------- ------------

-------------

1 1 e(1,4,11,13,15-19,21-22), other Required g(1-3),ch(1-8) 40 A-Net e4,g(2-3) permanent Required

linksys-srw224g4@cntei# sh int switchport eth e3 Port : e3 Port Mode: Trunk Gvrp Status: disabled Ingress Filtering: true Acceptable Frame Type: admitAll Ingress UnTagged VLAN ( NATIVE ): 1 Protected: Disabled

Port is member in:

Vlan Name Egress rule Port Membership Type

---- -------------------------------- ----------- --------------------

1 1 Untagged System 40 A-Net Tagged Static

Forbidden VLANS:

Vlan Name

---- --------------------------------

Classification rules: linksys-srw224g4@cntei#

And this is Catalyst config:

2950#sh ver Cisco Internetwork Operating System Software IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(20)EA1, RELEASE SOFTWARE (fc1) Copyright (c) 1986-2004 by cisco Systems, Inc. Compiled Wed 04-Feb-04 21:21 by yenanh Image text-base: 0x80010000, data-base: 0x805A8000

ROM: Bootstrap program is C2950 boot loader

2950 uptime is 1 day, 21 hours, 32 minutes System returned to ROM by power-on System image file is "flash:/c2950-i6q4l2-mz.121-20.EA1.bin"

cisco WS-C2950-12 (RC32300) processor (revision F0) with 20713K bytes of memory. Processor board ID FHK0635W0PR Last reset from system-reset Running Standard Image

12 FastEthernet/IEEE 802.3 interface(s)

32K bytes of flash-simulated non-volatile configuration memory. Base ethernet MAC Address: 00:0A:B7:E3:C4:00 Motherboard assembly number: 73-5782-11 Power supply part number: 34-0965-01 Motherboard serial number: FOC063507U0 Power supply serial number: DAB06336Z6E Model revision number: F0 Motherboard revision number: A0 Model number: WS-C2950-12 System serial number: FHK0635W0PR Configuration register is 0xF

2950# interface FastEthernet0/1 description "P-t-P link with LinkSys SRW224g4@cntei" switchport trunk allowed vlan 1,40 switchport mode trunk ! interface FastEthernet0/2 description "A-Net users" switchport access vlan 40 switchport mode access !

So what you can advice me to do in this situation?