Smart Serial Bandwidth

peni

Hi all,

I am having issues connecting the serial wic 2t on the cisco 2811 routers between sites. It works well with 64kbps leased circuit but not anything above that???

Configs are ok on the interfaces, lights are green/on....interface is up bit line protocol is down when connected to a 512K leased circuit from Telco.....

Need help...

astorrs

Can you post the relevant config.

Serial0

peni wrote:

Hi all,

I am having issues connecting the serial wic 2t on the cisco 2811 routers between sites. It works well with 64kbps leased circuit but not anything above that???

Configs are ok on the interfaces, lights are green/on....interface is up bit line protocol is down when connected to a 512K leased circuit from Telco.....

Need help...

The wic-2t does not have an integrated CSU/DSU. Which brand/model external CSU/DSU are you using? Also, is this an upgrade of an existing circuit or a newly provisioned line?

Assuming that you have a T1 type external CSU/DSU, you will need to enable an additional 7 channels for a total of 8 (8x64k=512k).

If this is an upgrade of an existing circuit, are there any issues at 128k, 256k, and 384k? What was Telco's response/advice on the issue?

astorrs

Serial0 wrote:

...you will need to enable an additional 7 channels...

Thanks Serial, I thought about asking this, but assumed it had been done.

"In any pursuit of knowledge, even one small false assumption can throw one way off course."

peni

hi serial0...

We r using an alcatel 2801 mainstreet modem....no, there is no upgrade involved for link speeds....

how do i enable additional channels on the router interfaces?? Command involved??

Serial0

I worked with Cisco serial interfaces connected to external CSU/DSU such as the Astrocom SP-100, and Digital Link DL080, and various Motorola & Kentrox in the past. In each case, the speed adjustments were made on the external device via console or external interface on the unit. With that said, the Alcatel 2801 may be different. As astorrs suggested, posting the relevent config of the serial interface may help.

I can't seem to google an installation guide for your particular device, however, according to a data sheet at http://www.voxtechnologies.com/2600_2700_2800_mainstreet_family_data_termination_units_data_sheet.htm

"simple installation, no on-site configuration required, all operating parameters are software configurable locally or remotely"

To me, this suggest that the settings are done at the external device.

astorrs

Serial0 wrote:

...all operating parameters are software configurable locally or remotely...

It sounds like although there are no buttons to configure things ala old school Adtrans, that there still must be a way to set the clock type, etc on the device.

Do you have access to the Alcatel modem via a CLI?

peni

Hi all,

We have managed to resolve this issue. A simple re-cycling of power for the Cisco routers did the trick.

Thank u all for the posts. Has helped me expand my knowledge a bit more on CSU/DSU....

astorrs

Interesting... Would you mind sharing the router config for the applicable interface if you have time? I'm still trying to figure out the how.

peni

Hi astorrs,

config is here....

---

Current configuration : 1382 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname SuvaRTR
!
boot-start-marker
boot-end-marker
!
no aaa new-model
!
resource policy
!
ip subnet-zero
!
!
ip cef

interface FastEthernet0/0
ip address 10.1.0.2 255.255.0.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0/0
ip address 10.240.0.1 255.255.0.0
clock rate 2000000
!
interface Serial0/0/1
ip address 10.243.0.1 255.255.0.0

interface Serial0/1/0
ip address 10.242.0.2 255.255.0.0
!
interface Serial0/1/1
no ip address
shutdown
clock rate 2000000
!
router ospf 1
log-adjacency-changes
network 10.0.0.0 0.255.255.255 area 0
!
ip classless
ip route 10.25.0.0 255.255.0.0 10.243.0.2
!
ip http server
!
!
control-plane
!!
line con 0
password ***********
login
line aux 0
line vty 0 4
password ***********
login
!
scheduler allocate 20000 1000
!
end

peni

It looks like i spoke too soon.....

this is what the message looks like when debug serial interface is turned on...

---

*Jun 3 06:36:30.295: Serial0/0/0: HDLC myseq 24, mineseen 0, yourseen 0, line down
*Jun 3 06:36:30.307: Serial0/0/1: HDLC myseq 24, mineseen 24*, yourseen 9000, line up
*Jun 3 06:36:30.319: Serial0/1/0: HDLC myseq 24, mineseen 0, yourseen 0, line down
*Jun 3 06:36:40.295: Serial0/0/0: HDLC myseq 25, mineseen 0, yourseen 0, line down
*Jun 3 06:36:40.307: Serial0/0/1: HDLC myseq 25, mineseen 25*, yourseen 9001, line up
*Jun 3 06:36:40.319: Serial0/1/0: HDLC myseq 25, mineseen 0, yourseen 0, line down
*Jun 3 06:36:50.295: Serial0/0/0: HDLC myseq 26, mineseen 0, yourseen 0, line down
*Jun 3 06:36:50.307: Serial0/0/1: HDLC myseq 26, mineseen 26*, yourseen 9002, line up
*Jun 3 06:36:50.319: Serial0/1/0: HDLC myseq 26, mineseen 0, yourseen 0, line down
*Jun 3 06:36:51.295: Serial0/0/0: attempting to restart
*Jun 3 06:36:51.295: gt96k_mbrd_serial_mode_reg_init:: was DTE, now set to DTE
*Jun 3 06:36:51.295: DTE idb->dte_interface = DTE
*Jun 3 06:36:51.295: Dscc4(Serial0/0/0): DCD is up.

*Jun 3 06:36:51.319: Serial0/1/0: attempting to restart
*Jun 3 06:36:51.319: gt96k_mbrd_serial_mode_reg_init:: was DTE, now set to DTE
*Jun 3 06:36:51.319: DTE idb->dte_interface = DTE
*Jun 3 06:36:51.319: Dscc4(Serial0/1/0): DCD is up.

---

Getting a bit frustrated here, used a loopback address to ping interface, worked ok....as soon as we connect serial cables to CSU/DSU, interfaces start resetting over n over again....

Desparately need help here.....kinda running out of options on what to check....

astorrs

Can you post a "show interface serial 0/0/0" too?

peni

Hi astorrs,

this is the output...

---

Serial0/0/0 is up, line protocol is down
Hardware is GT96K Serial
Internet address is 10.240.0.1/16
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 248/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input never, output 00:00:06, 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 0/2/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
63 input errors, 62 CRC, 3 frame, 1 overrun, 0 ignored, 61 abort
69 packets output, 3427 bytes, 0 underruns
0 output errors, 0 collisions, 35 interface resets
0 output buffer failures, 0 output buffers swapped out
2 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

astorrs

Hmm. I'm pretty sure slot WIC0 on the 2801 only supports VIC and VWIC cards.

I notice you're having the same problem on all 3 serial interfaces, are they all connected to the same kind of HDSL T1 lines?

peni

yes all 3 are connected to the same type of leased circuit from Telecom and all are on the WIC 0 slot.

astorrs

Okay, if you plugged the 64k leased line in would it work without changing anything except the cable (or does it used the same Alcatel HDSL modem)?

peni

the 64k leased line uses a different modem. It is connected to Serial 0/0/1 interface on the same card.

i have plugged the 64k line to the serial 0/0/0 interface and changed the address....int comes up but line protocol stays down.

astorrs

Move the WIC-1T to slot3 and try again with the 64k line.

astorrs

I've just confirmed on Cisco's site the following for the 2801 (it's different than the other 28xx series routers):

Slot0 - VIC or VWIC, for voice only
Slot1 - WIC, VIC, VWIC or HWIC
Slot2 - WIC, VIC or VWIC
Slot3 - WIC, VIC, VWIC or HWIC

peni

trying now....let u know soon....

is it the same for 2801 and 2811?? We are working on 2811 routers.

astorrs

Wow, its getting late. I'm confusing one question with another (had someone else with a 2801 and a different issue).

No its not the same for 2811s. That one supports all of the types in each slot plus double-width cards. Sorry.

Okay, do this then plug the Alcatel 512k line into Serial2 where the 64k line normally lives (I want to rule out a faulty WIC).

Sorry again.

peni

had my hopes up for a while there....

we are using WIC 2T serial cards with 2 interfaces per card....the 64k line resides on the same card as the 512K line....do i still need to move it to the second port on the same card??

astorrs

I must go to sleep soon making stupid mistakes...

What happens to the 512k line when connected to Serial0/0/1 with the only change to the config flipping the IPs?

peni

changing now....let u know real soon...

peni

tried connecting 512k to 64k port.......interface is up, line protocol is still down.......same result as before....

did a debug serial int and the seri 0/0/1 int is attempting to restart....could it be a sync issue between modem and smart serial port/card???

astorrs

Maybe it doesn't understand HDLC, try "encapsulation ppp" in the interface config.

What's on the other end of this line?

peni

tried....no luck...same result...

Is there some sort of bandwidth restriction on the smart WIC 2T cards by default??

astorrs

No. If its not encapsulation it could be clocking.

What is on the other end of the line? (a router you control or something else?)

peni

From the 2811 router, we connect to an Alcatel Mainstreet 2801 HDSL 2 wire 1Mbps DTU...this is connected to a leased circuit from Telecom. Same equipment on the other site......1 Mbps DTU and then connects to our router....

astorrs

Do a show controller serial 0/0/0 (or whatever card its on)

peni

this is the first few lines from output...512k is connected on serial 0/0/1

---

Interface Serial0/0/1
Hardware is GT96K
DTE Unknown (13)idb at 0x42F54B88, driver data structure at 0x42F5C2A4
wic_info 0x42F5C8A0
Physical Port 0, SCC Num 0
MPSC Registers:
MMCR_L=0x000304C0, MMCR_H=0x00000000, MPCR=0x00000100
CHR1=0x00FE007E, CHR2=0x00000000, CHR3=0x00000648, CHR4=0x00000000
CHR5=0x00000000, CHR6=0x00000000, CHR7=0x00000000, CHR8=0x00000000
CHR9=0x00000000, CHR10=0x00001828
SDMA Registers:
SDC=0x00002201, SDCM=0x00000080
CRDP=0x0F844C40, CTDP=0x0F8600C0, FTDB=0x0F8600C0
Main Routing Register=0x77770000 BRG Conf Register=0x00490018
Rx Clk Routing Register=0x00008888 Tx Clk Routing Register=0x00003219
GPP Registers:
Conf=0x50055600, Io=0x50055600, Data=0xEBFFFFFB, Level=0x08000018
TDM FPGA Registers:
vmcr[0] = 0x00034080, vmcr[1] = 0x000380C0,
vmcr[2] = 0x00000000, vmcr[3] = 0x00000000
ntrcr0 = 0x00000000, ntrcr1 = 0x00000000
tdmcr = 0x0000006A, labcr = 0x00000000, tpllr_cr = 0x00000000
nhr = 0x66667007, isr = 0x00000000, imr = 0x00000004
0 input aborts on receiving flag sequence
0 throttles, 0 enables
0 overruns
0 transmitter underruns
0 transmitter CTS losts
0 rxintr, 402 txintr, 0 rxerr, 0 txerr
178062 mpsc_rx, 0 mpsc_rxerr, 177948 mpsc_rlsc, 114 mpsc_rhnt, 0 mpsc_rfsc
227 mpsc_rcsc, 0 mpsc_rovr, 0 mpsc_rcdl, 0 mpsc_rckg, 0 mpsc_bper
0 mpsc_txerr, 513 mpsc_teidl, 0 mpsc_tudr, 0 mpsc_tctsl, 0 mpsc_tckg
0 sdma_rx_sf, 0 sdma_rx_mfl, 0 sdma_rx_or, 0 sdma_rx_abr, 0 sdma_rx_no
0 sdma_rx_de, 0 sdma_rx_cdl, 0 sdma_rx_ce, 0 sdma_tx_rl, 0 sdma_tx_ur, 0 sdma_tx
_ctsl
0 sdma_rx_reserr, 0 sdma_tx_reserr
0 rx_bogus_pkts, rx_bogus_flag FALSE
0 sdma_tx_ur_processed

tx_limited = 1(2), errata19 count1 - 0, count2 - 0
Receive Ring
rxr head (0)(0x0F844C40), rxr tail (0)(0x0F844C40)
rmd(F844C40): nbd F844C50 cmd_sts 80800000 buf_sz 06000000 buf_ptr F860960
rmd(F844C50): nbd F844C60 cmd_sts 80800000 buf_sz 06000000 buf_ptr F860FC0
rmd(F844C60): nbd F844C70 cmd_sts 80800000 buf_sz 06000000 buf_ptr F861620
rmd(F844C70): nbd F844C80 cmd_sts 80800000 buf_sz 06000000 buf_ptr F861C80