show controllers "transmit ring"

Unanswered Question
Jul 28th, 2009

Hello,

I am having some trouble with a T1 between a Cisco 1721 router with a WIC-1T and a remote T1 router.

The provider is saying that everything is fine, but the show controller outpout looks strange, and I was looking to get some feedback on the "tranmit ring" section and what it indicates.

Interface Serial1

Hardware is PowerQUICC MPC860 with Integrated FT1 CSU/DSU module

TX and RX clocks detected.

idb at 0x8173A68C, driver data structure at 0x81742428

SCC Registers:

General [GSMR]=0x2:0x00000030, Protocol-specific [PSMR]=0x8

Events [SCCE]=0x0300, Mask [SCCM]=0x001F, Status [SCCS]=0x03

Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0x7E7E

Interrupt Registers:

Config [CICR]=0x00365F80, Pending [CIPR]=0x04008800

Mask [CIMR]=0x60204400, In-srv [CISR]=0x00000000

Command register [CR]=0x640

Port A [PADIR]=0x0000, [PAPAR]=0x0F0F

[PAODR]=0x0000, [PADAT]=0xE1FF

Port B [PBDIR]=0x0380F, [PBPAR]=0x0C00E

[PBODR]=0x00000, [PBDAT]=0x3075C

Port C [PCDIR]=0x008, [PCPAR]=0x000

[PCSO]=0x0A0, [PCDAT]=0xFC6, [PCINT]=0x000

Receive Ring

rmd(FF002530): status 9000 length 60C address 3819D04

rmd(FF002538): status 9000 length 60C address 3817C84

rmd(FF002540): status 9000 length 60C address 3815584

rmd(FF002548): status 9000 length 60C address 381AA04

rmd(FF002550): status 9000 length 60C address 3813B84

rmd(FF002558): status 9000 length 60C address 3816284

rmd(FF002560): status 9000 length 60C address 3813504

rmd(FF002568): status 9000 length 60C address 3816904

rmd(FF002570): status 9000 length 60C address 381A384

rmd(FF002578): status 9000 length 60C address 3818984

rmd(FF002580): status 9000 length 60C address 3814204

rmd(FF002588): status 9000 length 60C address 3811B04

rmd(FF002590): status 9000 length 60C address 3814884

rmd(FF002598): status 9000 length 60C address 3819684

rmd(FF0025A0): status 9000 length 60C address 3812E84

rmd(FF0025A8): status B000 length 60C address 3816F84

Transmit Ring

tmd(FF0025B0): status 0 length 2C address 0

tmd(FF0025B8): status 0 length 2C address 0

tmd(FF0025C0): status 0 length 34 address 0

tmd(FF0025C8): status 0 length 2C address 0

tmd(FF0025D0): status 0 length 5E0 address 0

tmd(FF0025D8): status 0 length 5E0 address 0

tmd(FF0025E0): status 0 length 5E0 address 0

tmd(FF0025E8): status 0 length 5E0 address 0

tmd(FF0025F0): status 0 length 2E address 0

tmd(FF0025F8): status 0 length 2C address 0

tmd(FF002600): status 0 length 2C address 0

tmd(FF002608): status 0 length 5E0 address 0

tmd(FF002610): status 0 length 5E0 address 0

tmd(FF002618): status 0 length 5E0 address 0

tmd(FF002620): status 0 length 5E0 address 0

tmd(FF002628): status 2000 length 2E address 0

tx_limited=1(2)

SCC GENERAL PARAMETER RAM (at 0xFF003D00)

Rx BD Base [RBASE]=0x2530, Fn Code [RFCR]=0x18

Tx BD Base [TBASE]=0x25B0, Fn Code [TFCR]=0x18

Max Rx Buff Len [MRBLR]=1548

Rx State [RSTATE]=0x0, BD Ptr [RBPTR]=0x2530

Tx State [TSTATE]=0x0, BD Ptr [TBPTR]=0x25B0

SCC HDLC PARAMETER RAM (at 0xFF003D38)

CRC Preset [C_PRES]=0xFFFF, Mask [C_MASK]=0xF0B8

Errors: CRC [CRCEC]=0, Aborts [ABTSC]=0, Discards [DISFC]=0

Nonmatch Addr Cntr [NMARC]=0

Retry Count [RETRC]=0

Max Frame Length [MFLR]=1608

Rx Int Threshold [RFTHR]=0, Frame Cnt [RFCNT]=1585

User-defined Address 0000/0000/0000/0000

User-defined Address Mask 0x0000

buffer size 1524

PowerQUICC SCC specific errors:

17835 input aborts on receiving flag sequence

0 throttles, 0 enables

0 overruns

0 transmitter underruns

0 transmitter CTS losts

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Peter Paluch Wed, 07/29/2009 - 00:36

Jason,

Can you perhaps be more specific about the problems you are currently having with that interface?

Best regards,

Peter

Jasonch518_2 Wed, 07/29/2009 - 05:22

Sure,

The problem was that we could not get the interface to come up.

We actually ended up re-seating the WIC, which fixed the issue, oddly enough, since it seemed to be in just fine.

I was really just wondering what information can be identified from the transmit and receive ring data.

Thanks for the reply.

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