The topology is like this:
L3-6509 --- Nortel_1850 --- Nortel_Passport_8600 --- Nortel_1800 --- Client_PC
The configuration on L3-6509 is sub interface with encapsulation dot1q and IP address 192.168.0.1/24. Circuit between Nortel 1850 to Nortel 1800 is based on L2 link (TDI). Client IP address is 192.168.0.2/24. Ping from client PC to L3-6509 didn't work. If I replace the L3-6509 with Cisco 2600 or L3-4908, both with sub interface and encapsulation dot1q, ping from client PC is working. I think the problem is with L3-6509 IOS.
IOS version for L3-6509 is s72033-advipservicesk9_wan-mz.122-18.SXF5.bin.
IOS version for L3-4908 is cat2948g-in-mz.120-14.W5.20.bin
IOS version for 2600 Router is c2600-is-mz.122-4.T1.bin
Can someone help me for this problem ?
Thanks in advance,