Serial problems with upgrading 4500 with a 2651

[iridiot]

Man... is Cisco TAC driving me nuts... They are no help, so I'm posting this;

I've got two routers back to back thru a piece of DCE equipment that turns RS442/449 to fiber and back again. RouterA is a 4500, RouterB is a 7206. Encap is HDLC, IP broadcast domain is class C. Pretty much a default config DTE->DCE->DTE over RS449
When I put a 2651 router in place of the 4500, line is up but protocol stays down. Routers both see clock. and all physical lines are in proper state (DSR, DTR etc...)
IOS on 4500 is 11.1.24
IOS on 2600 is 12.3.4
IOS on 7200 is 12.1.

What is the problem? it seems like the 2600 will not transmit data. Debug shows HDLC packets going out on both sides but none being recieved... Interfaces are good because I went back to back using V.35 DCE to DTE cables.

Config on 4500 (when connected to 7200):
Serial0 is up, line protocol is up
Hardware is HD64570
Internet address is 172.16.26.254/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
buffer size 1524 Universal Serial: DTE V.11 (RS-449) cable
cpb = 0x0, eda = 0x7190, cda = 0x71A4

Config on 7200 (when connected to 2600):

Serial4/3 is up, line protocol is down
Hardware is M4T
Internet address is 172.16.26.253/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive set (10 sec)

M4T: show controller:
PAS unit 7, subunit 3, f/w version 3-101, rev ID 0x2800001, version 3
idb = 0x6299CA1C, ds = 0x6299E7DC, ssb=0x6299EB10
Clock mux=0x0, ucmd_ctrl=0xC, port_status=0x75
Serial config=0x8, line config=0x200
maxdgram=1608, bufpool=48Kb, 96 particles
DCD=up DSR=up DTR=up RTS=up CTS=up
line state: up
cable type : V.11 (RS-449) DTE cable, received clockrate 1543650

Config on 2600 when connected to 7206:

Serial0/0 is up, line protocol is down
Hardware is PowerQUICC Serial
Description: Connection to BL-7507 SNOC link
Internet address is 172.16.26.254/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
sh cont s0/0
Interface Serial0/0
Hardware is PowerQUICC MPC860
DTE V.11 (RS-449) TX and RX clocks detected.
idb at 0x832C6098, driver data structure at 0x832CDE34
SCC Registers:
General [GSMR]=0x2:0x00000030, Protocol-specific [PSMR]=0x8
Events [SCCE]=0x0000, Mask [SCCM]=0x001F, Status [SCCS]=0x03
Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0x7E7E

Has anyone seen this kind of upgrade issue before?

Regards

Iridiot

 

[rburke]

Has the 2600 interface ever been in a Up/Up before, or is it a new piece of equipment? Would it be possible to see if you can get the 4500 and 2600 working back-to-back just to prove that the 2600 should work? Just out of curiosity what is TAC saying about it?

That is all I can think of right now, if it is a new piece of equipment then that Serial might be DOA. If it has been working somewhere else then I would still connect it to the 4500 just to make sure. If it works on the 4500 then post back and let us know.

Burke

 

[iridiot]

Yea, I went back to back with V.35 DCE->DTE cables to verify the interfaces were good. Luckly I have a lab to do this in. I started this project out in the field and ran across this problem. I now have a test bed set up like the field config. TAC is not very helpful, I specifically asked them a few pointed questions about the differences in the interfaces and they still haven't answered them It could be just an incompatability with my DCE equipment (Canoga-Perkins F/O modem) but Cisco should be able to tell me what the differences between a 4500 serial interface and 2600 WIC are...

 

[rburke]

Yeah, I agree.. Well if the 2651 works then I would have to concur with it being a compatibility issue. Have you tried googling for any known issues? Did the TAC say they were going to investigate or just leave you hanging? If you had an extra WIC around I would say to try to replace it and see if anything changed. But that is just a last ditch suggestion. Let us know what happens.

Burke