Cisco 3745 router error: Illegal Hdlc Serial Type Code 65535

[abiosei]

I have tried to connect two 3700 routers together using a back to back serial point to point connection and when I do show interface on both routers i see interface up line protocol down.
both interfaces are on the same subnet
the router with the dce cable connected is providing the clocking
encapsulation is hdlc at both ends
there is no access control list set
keep alive is set on both interfaces

when i do a debug serial interface on both routers, i get the error message:
Illegal hdlc serial type code 65535
and no keeplives are being exchange

I have tried using the cisco online interpreter and the only suggestion it is givin is that the routers are sending packets that contain unrecognized packets. i really dont know what dat means.

I have tried the same serial cable, serial network modules and configurations on other routers and it works so its more like an issue with the routers. The ios on the 3700 is the v12.4

I will really appreciate it if anyone has a solution to this problem

 

[burtsbees]

Is this a new cable? Have you tried swapping cables? Can you post a show interface s(whatever the number, like s0/0---whatever your setup is), and show controllers s (again, whatever the setup for the serial interface is)?

Burt

 

[abiosei]

thanks burtsbees

like i said the same cables, serial modules, and configuration work on the 2600 routers that i have. so i tink its a problem with the packets the 3700 routers are generating
Below are the outputs of the commands u requested

THIS IS ON THE DCE ROUTER

sho int ser1/1
Serial1/1 is up, line protocol is down
Hardware is CD2430 in sync mode
Internet address is 10.10.10.1/24
MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:07, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/32 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 96 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
20 packets input, 1854 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
22 packets output, 822 bytes, 0 underruns
0 output errors, 0 collisions, 7 interface resets
0 output buffer failures, 0 output buffers swapped out
40 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

Router#sho controller s1/1
CD2430 Slot 1, Port 1, Controller 0, Channel 1, Revision 19
Channel mode is synchronous serial
idb 0x658F0AC4, buffer size 1524, V.35 DCE cable, clockrate 64000

Global registers
rpilr 0x2, rir 0x1, risr 0x0, rfoc 0x0, rdr 0x0
tpilr 0x1, tir 0x1, tisr 0x60, tftc 0x0, tdr 0x2
mpilr 0x3, mir 0x1, misr 0x60
bercnt 0xFF, stk 0x0
Per-channel registers for channel 1
Option registers
0x02 0x00 0x42 0x67 0x60 0x00 0x00
Command and status registers
cmr 0xC0, ccr 0x00, csr 0xC8, msvr-rts 0xF1, msvr-dtr 0xF1
Clock option registers
rcor 0x86, rbpr 0x01, tcor 0xC0, tbpr 0x11
Interrupt registers
ier 0x89, livr 0x04, licr 0x04
DMA buffer status 0x02
DMA receive registers
arbaddr 0x171CEF64, arbcnt 1548, arbsts 0x1
brbaddr 0x171CFC64, brbcnt 1548, brbsts 0x1
rcbaddr 0x171CF5FC
DMA transmit registers
atbaddr 0x171DF0B4, atbcnt 24, atbsts 0x0
btbaddr 0x171DEE34, btbcnt 24, btbsts 0x0
tcbaddr 0x171DF0CC
Special character registers
schr1 0x00, schr2 0x00, schr3 0x00, schr4 0x00
scrl 0x0, scrh 0x0, lnxt 0xF1
Driver context information
Context structure 0x658F2DE0, Register table 0x3D000400
Serial Interface Control 5:1 Register (0x3D000806) is 0x80
Adaptor Flags 0x0
Serial Modem Control Register (0x3D000808) is 0x1D
Receive static buffer 0x6575F24C
Receive particle buffers 0x658F3480, 0x658F3500
Transmit DMA buffers 0x0, 0x0, 0x0, 0x0
Transmit packet with particles 0x0, first word is 0x0
Interrupt rates (per second) transmit 0, receive 0, modem 0
True fast-switched packets 0
Semi fast-switched packets 0
Transmitter hang count 0
Residual indication count 0
Bus error count 0
Aborted short frames count 0
CRC short frames count 0
Tx DMA low threshold count 0
Error counters
CTS deassertion failures 0
Nested interrupt errors transmit 0, receive 0, modem 0


Router#debug seria int
Serial network interface debugging is on
Router#
*Mar 1 11:39:33.223: Serial1/1: HDLC myseq 19, mineseen 0, yourseen 0, line down
*Mar 1 11:39:36.227: Illegal HDLC serial type code 0, PC=0x604D2618

*Mar 1 11:39:37.223: CIRRUS(1): DTR is down
*Mar 1 11:39:43.223: Serial1/1: HDLC myseq 20, mineseen 0, yourseen 0, line down
*Mar 1 11:39:44.223: Serial1/1: attempting to restart
*Mar 1 11:39:44.223: Serial1, cd2430_sync_mode_init
*Mar 1 11:39:44.223: CIRRUS(1): Deasserting DSR
*Mar 1 11:39:44.223: CIRRUS(1): Deasserting DCD
*Mar 1 11:39:44.223: CIRRUS(1): Deasserting CTS
*Mar 1 11:39:44.223: CIRRUS(1): Reset from 0x60365F60
*Mar 1 11:39:44.223: CIRRUS(1): Asserting DSR
*Mar 1 11:39:44.223: CIRRUS(1): Asserting CTS
*Mar 1 11:39:44.223: CIRRUS(1): Asserting DCD
*Mar 1 11:39:46.227: Illegal HDLC serial type code 0, PC=0x604D2618


and

THIS IS ON THE DTE ROUTER

sho int s1/0
Serial1/0 is up, line protocol is down
Hardware is CD2430 in sync mode
Internet address is 10.10.10.2/24
MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:09, output 00:00:06, output hang 00:29:06
Last clearing of "show interface" counters 00:29:33
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
159 packets input, 6518 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
167 packets output, 7164 bytes, 0 underruns
0 output errors, 0 collisions, 56 interface resets
0 output buffer failures, 0 output buffers swapped out
99 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up


Router#sho contro s1/0
CD2430 Slot 1, Port 0, Controller 0, Channel 0, Revision 19
Channel mode is synchronous serial
idb 0x65341194, buffer size 1524, V.35 DTE cable

Global registers
rpilr 0x2, rir 0x0, risr 0x0, rfoc 0x0, rdr 0xC0
tpilr 0x1, tir 0x0, tisr 0x68, tftc 0x0, tdr 0x68
mpilr 0x3, mir 0x0, misr 0xC0
bercnt 0xFF, stk 0x0
Per-channel registers for channel 0
Option registers
0x02 0x00 0x42 0xE7 0xE0 0x00 0x00
Command and status registers
cmr 0xC0, ccr 0x00, csr 0xCC, msvr-rts 0xF1, msvr-dtr 0xF1
Clock option registers
rcor 0x86, rbpr 0x01, tcor 0xC8, tbpr 0x01
Interrupt registers
ier 0x89, livr 0x00, licr 0x00
DMA buffer status 0x20
DMA receive registers
arbaddr 0x171CA124, arbcnt 1548, arbsts 0x1
brbaddr 0x171CAE24, brbcnt 1548, brbsts 0x1
rcbaddr 0x171CA7BC
DMA transmit registers
atbaddr 0x171F16F4, atbcnt 24, atbsts 0x62
btbaddr 0x171F1974, btbcnt 24, btbsts 0x62
tcbaddr 0x171F198C
Special character registers
schr1 0x00, schr2 0x00, schr3 0x00, schr4 0x00
scrl 0x0, scrh 0x0, lnxt 0xF1
Driver context information
Context structure 0x653434B0, Register table 0x3D000400
Serial Interface Control 5:1 Register (0x3D000802) is 0x0
Adaptor Flags 0x0
Serial Modem Control Register (0x3D000804) is 0x18
Receive static buffer 0x651B4808
Receive particle buffers 0x65343B00, 0x65343B80
Transmit DMA buffers 0x0, 0x0, 0x0, 0x0
Transmit packet with particles 0x0, first word is 0x0
Interrupt rates (per second) transmit 0, receive 0, modem 0
True fast-switched packets 0
Semi fast-switched packets 0
Transmitter hang count 4
Residual indication count 0
Bus error count 0
Aborted short frames count 0
CRC short frames count 0
Tx DMA low threshold count 0
Error counters
CTS deassertion failures 0
Nested interrupt errors transmit 0, receive 0, modem 0


Router#debug serial int
Serial network interface debugging is on
Router#
*Mar 1 05:29:11.203: Illegal HDLC serial type code 0, PC=0x604D2618

*Mar 1 05:29:12.199: CIRRUS(0): DCD is down
*Mar 1 05:29:14.151: Serial1/0: HDLC myseq 63, mineseen 0, yourseen 0, line down
*Mar 1 05:29:21.203: Illegal HDLC serial type code 0, PC=0x604D2618

*Mar 1 05:29:24.151: Serial1/0: HDLC myseq 64, mineseen 0, yourseen 0, line down
*Mar 1 05:29:31.203: Illegal HDLC serial type code 0, PC=0x604D2618

*Mar 1 05:29:34.151: Serial1/0: HDLC myseq 65, mineseen 0, yourseen 0, line down
*Mar 1 05:29:35.151: Serial1/0: attempting to restart
*Mar 1 05:29:35.151: Serial0, cd2430_sync_mode_init
*Mar 1 05:29:35.151: CIRRUS(0): Deasserting DTR
*Mar 1 05:29:35.151: CIRRUS(0): Deasserting RTS
*Mar 1 05:29:35.151: CIRRUS(0): Reset from 0x60365F60
*Mar 1 05:29:35.151: CIRRUS(0): Asserting DTR
*Mar 1 05:29:35.151: CIRRUS(0): Asserting RTS
*Mar 1 05:29:41.203: Illegal HDLC serial type code 0, PC=0x604D2618


*Mar 1 05:30:12.203: CIRRUS(0): DCD is down all
All possible debugging has been turned off
Router#
*Mar 1 05:30:14.151: Serial1/0: HDLC myseq 69, mineseen 0, yourseen 0, line down


I'lld be glad if u can come up with a solution to this annoying problem

 

[burtsbees]

I'm not exactly familiar with this sort of interface, but since HDLC is Cisco proprietary, and it seems the chipset on the serial interface is from a different vendor, perhaps you can try
Router>en
Router#conf t
Router(config)#int s1/0
Router(config-if)#encaps ppp
Router(config-if)#^z

On s1/0 and s1/1...other than that, I did find this...

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121t/121t2/2dt_alps.htm

Sorry I can't be of any real help, unless this helps.

Burt