Another DSP issue and error 0x80AA

I had to solve another problem with switching congestion equipement.
Again
Cause i = 0x80AA - Switching equipment congestion
However dspware version from “show voice dsp detail” was OK I tried:
test dsp device 0 all reset but it hasn’t changed my status. Resetting router aka reload and no change at all.
What I found was here:
router# Show voice dsp group all
DSP groups on slot 0:
dsp 1:
State: FAIL, firmware: 23.8.0
Max signal/voice channel: 16/16
Max credits: 240
num_of_sig_chnls_allocated: 8
Transcoding channels allocated: 0
Group: FLEX_GROUP_VOICE, complexity: FLEX
Shared credits: 240, reserved credits: 0
Signaling channels allocated: 8
Voice channels allocated: 0
Credits used: 0


dsp 2:
State: UP, firmware: 23.8.0
Max signal/voice channel: 16/16
Max credits: 240
num_of_sig_chnls_allocated: 0
Transcoding channels allocated: 0
Group: FLEX_GROUP_VOICE, complexity: FLEX
Shared credits: 240, reserved credits: 0
Signaling channels allocated: 0
Voice channels allocated: 0
Credits used: 0


Another time another DSP module to replace.

How to limit E1 channels

If there is an idea that you will need guarantize a few channels for incoming calls there is one good method.
1. In global configuration mode create a label
trunk group OUTGOING_CALLS
2. For controller assign trunk group and limit channels. Remember, it depends from provider’s setup of channels selection. Bottom-to-Top or Top-to-Bottom.
controller E1 0/2/0
pri-group timeslots 1-31
trunk-group OUTGOING_CALLS timeslots 1-9
3. Assign trunk group to outgoing dial-peer
dial-peer voice 100 pots
trunkgroup OUTGOING_CALLS

If there is a need to limit an incoming calls, just contact telco provider.

DSP issue and switching equipment congestion

A few weeks ago I faced an issue with DSP module. I was looking for a solution but there was a poor description in the network. Even Cisco error decoder hadn’t help at all. I hope this will help someone.
The problem waswith calls establishing. Phones were calling but no voice channel was created. In logs just short info.
Cause i = 0x80AA - Switching equipment congestion
I checked translation-rules, dial-peers etc. but when no changes have been done it wouldn’t be so simple. Some more discoveries and diagnostic as below:
Sh voice dsp detailed
*
*
Warning! DSPs1, in slot 0 are using non-default firmware from flash:
This is not recommended, the default version is 23.8.0

----------------------------FLEX VOICE CARD 0 ------------------------------
*DSP VOICE CHANNELS*

CURR STATE : (busy)inuse (b-out)busy out (bpend)busyout pending
LEGEND : (bad)bad (shut)shutdown (dpend)download pending

DSP DSP DSPWARE CURR BOOT PAK TX/RX
TYPE NUM CH CODEC VERSION STATE STATE RST AI VOICEPORT TS ABRT PACK COUNT
===== === == ========= ========== ===== ======= === == ========= == ==== ============
C5510 001 01 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 02 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 03 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 04 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 05 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 06 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 07 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 08 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 09 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 10 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 11 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 12 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 13 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 14 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 15 None 0.0.0 bad idle 1 0 0 0/0
C5510 001 16 None 0.0.0 bad idle 1 0 0 0/0
C5510 002 01 None 23.8.0 idle idle 1 0 0 0/0
C5510 002 02 None 23.8.0 idle idle 1 0 0 0/0
C5510 002 03 None 23.8.0 idle idle 1 0 0 0/0
C5510 002 04 None 23.8.0 idle idle 1 0 0 0/0
C5510 002 05 None 23.8.0 idle idle 1 0 0 0/0
C5510 002 06 None 23.8.0 idle idle 1 0 0 0/0
C5510 002 07 None 23.8.0 idle idle 1 0 0 0/0
C5510 002 08 None 23.8.0 idle idle 1 0 0 0/0
Difference between DSP NUM 1 and 2 shows that number 1 was broken. Fast change corrected and issue and all came back to normal work.

Reverse telnet – AUX to Console

I needed some access from router to switch without running adn connecting directly to switch. An Idea was to check if it is possible to connect through AUX port on Cisco router to HP proCurve console port.
Well, It is possible and simple, so:
1. Connect Cisco console cable between AUX on router and Console port on switch
2. Configure router AUX port
line aux 0
modem InOut
transport input all
speed 9600 (default or more – the same as for switch)
3. If there is no loopback create one
4. Check communication lines
RTR#sh line
Tty Line Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns Int
0 0 CTY - - - - - 0 0 0/0 -
1 1 AUX 9600/9600 - inout - - - 1 0 29/71480 -
194 194 VTY - - - - - 6 0 0/0 -
* 195 195 VTY - - - - - 3 0 0/0 -
196 196 VTY - - - - - 0 0 0/0 -
197 197 VTY - - - - - 0 0 0/0 -
* marks the line you are connected through. My example is from router 1841
5. Whatever you found lines have different numbering on different router’s series, so just telnet to loopback address and port 2000+ AUX line. In my case 2001.
6. When you has finished, while use keys combination CTRL+SHIFT+6, then press X.
This will disconnect you from the AUX port (and switch in my case)
7. To reconnect to AUX, first it is needed to clear line:
clear line x (in my case x=1)

It is nice I will have access to legacy PBX via IP. Dial-up is history.

CallManager’s high CPU usage

I found interesting issue last week. In the cluster of Cisco Unified CallManager + IP Contact Center Express enviroment calls had been routed with a long delay between a moment when an agent pickup a call and the moment when both sides can hear each other. The delay was even 5 seconds long.
The fact I faced a few other issues with some services of IPCCx in cluster mode I was looking for a solution at wrong places. Finally I found that publisher’s high CPU usage made by one service occupied entire free CPU resource.
Why issue on publisher (not on subscriber) did it 😉 ?

Cisco IP phone on ProCurve

I faced a problem with vlans in ip telephony network.
It is not so easy like when all devices are from one brand – Cisco. I dig net and many advices was unclear or took many replies on forums, so I wrote all tasks needed I hope clearly.

1. Make sure phones support LLDP
2. Enable LLDP on proper ports, also on uplink ports to other switches (looks the first switch doesn’t need LLDP on port to router)
3. Create DHCP pools on router or PC, remeber about option 150 for VOICE vlan
4. Create vlans on ProCurve switch that match (of course) vlans on router
5. Mark Voice vlan as voice
6. Mark DATA VLAN as UNTAGGED and VOICE VLAN as TAGGED on required ports
7. QoS marking in vlans is not needed

For me works fine!

Business divorce

I have been watching how things go since the end of Cisco and HP allince has became a fact.

After a few doubts I think more and more it would be a very interesting future. Very interesting for IT market. Even more after aquisition of 3COM by HP.

Why? Well the truth is that HP with entire past portfolio wasn’t a comparable competitor to Cisco. At those times when big companies grow in many cases by merges and aquistions it looks normal procedure to be strong and valuable in specific market. Of course today, aquisition is not 100% sure, but as many I wonder what product from both sides will be developed and what not.

From my point of view I am most curios about IP telephony – will it go to develop 3COM solutions separately or will be merged to HP ONE? What will be better from switches, security and wireless. Colubris technology is really cool, security I don’t know a lot but opinions let’s me thing Tipping Point will be one of diamonds in the crown.

Big question is: product to be developed further will be chosen because of their advantages or there will be more inside “fight” to force products, not always the best.