ISDN PRI E1 BACK TO BACK CONFIGURACION

Bueno, ya está bien de teoría. Vamos a emular una línea PSTN para nuestro laboratorio.

nubepstn2

Para esta receta necesitaremos:

2 router Cisco 2801
1 recursos DSP en cada router
1 tarjeta VWIC 1MFT-G703  E1 en cada router
1 cable cruzado T1. Ojo, no es un cable de red cruzado. Si no sois manitas con la crimpadora, se puede comprar muy barato por ebay.

T1crossover

Antes, de empezar:

No instales las tarjetas VWIC E1 en el slot 0 del router. En la web de Cisco leemos:

Slot 0 does not support PRI on T1/E1 VWICs, only channel-associated signaling (CAS) digital voice.

R1#

System image file is “flash:c2801-ipvoice_ivs-mz.151-2.T1.bin”

Cisco 2801 (revision 5.0) with 333824K/59392K bytes of memory.
Processor board ID FCZ09302357
2 FastEthernet interfaces
4 Serial interfaces
1 Channelized E1/PRI port
1 DSP, 16 Voice resources
DRAM configuration is 64 bits wide with parity disabled.
191K bytes of NVRAM.
62720K bytes of ATA CompactFlash (Read/Write)

R1#show controller e1
E1 0/2/0 is down.
Applique type is Channelized E1 – balanced
Far End Block Errors Detected
Receiver has loss of signal.
alarm-trigger is not set
Version info Firmware: 20090113, FPGA: 20, spm_count = 0
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
Data in current interval (59 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 59 Unavail Secs
R1#show voice dsp group all
DSP groups on slot 0:
dsp 1:
State: UP, firmware: 26.8.0
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 (rounded-up): 0
0 DSP resource allocation failure

Configuración:

R1#configure terminal
R1(config)#isdn switch-type primary-net5
R1(config)#network-clock-participate wic 2
R1(config)#controller e1 0/2/0
R1(config-controller)#pri-group timeslots 1-3, 16
R1(config-controller)#no shutdown
R1(config-controller)#end

 

R2#

System image file is “flash:c2801-advipservicesk9-mz.151-3.T.bin”

Cisco 2801 (revision 5.0) with 241664K/20480K bytes of memory.
Processor board ID FCZ101013AH
2 FastEthernet interfaces
4 Serial interfaces
1 Channelized E1/PRI port
1 Virtual Private Network (VPN) Module
1 DSP, 16 Voice resources
DRAM configuration is 64 bits wide with parity disabled.
191K bytes of NVRAM.
1000944K bytes of ATA CompactFlash (Read/Write)

R2#show controllers e1
E1 0/3/0 is up.
Applique type is Channelized E1 – balanced
No alarms detected.
alarm-trigger is not set
Version info Firmware: 20090113, FPGA: 20, spm_count = 0
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
Data in current interval (69 seconds elapsed):
13 Line Code Violations, 13 Path Code Violations
1 Slip Secs, 0 Fr Loss Secs, 3 Line Err Secs, 0 Degraded Mins
2 Errored Secs, 0 Bursty Err Secs, 1 Severely Err Secs, 0 Unavail Secs
R2#show voice dsp group all
DSP groups on slot 0:
dsp 1:
State: UP, firmware: 27.2.0
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 (rounded-up): 0
0 DSP resource allocation failure

Configuración:

R2(config)#isdn switch-type primary-net5
R2(config)#network-clock-participate wic 3
R2(config)#controller e1 0/3/0
R2(config-controller)#pri-group timeslots 1-3, 16
R2(config-controller)#no shutdown
R2(config-controller)#end
R2#configure terminal
R2(config)#interface serial 0/3/0:15
R2(config-if)#isdn protocol-emulate network
R2(config-if)#end

R2#show isdn status
Global ISDN Switchtype = primary-net5
ISDN Serial0/3/0:15 interface
******* Network side configuration *******
dsl 0, interface ISDN Switchtype = primary-net5
Layer 1 Status:
ACTIVE
Layer 2 Status:
TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 0 CCBs = 0
The Free Channel Mask: 0x80000007
Number of L2 Discards = 0, L2 Session ID = 7
Total Allocated ISDN CCBs = 0
R2#show voice port summary
IN OUT
PORT CH SIG-TYPE ADMIN OPER STATUS STATUS EC
=============== == ============ ===== ==== ======== ======== ==
0/3/0:15 01 isdn-voice up dorm none none y
0/3/0:15 02 isdn-voice up dorm none none y
0/3/0:15 03 isdn-voice up dorm none none y

PWR FAILOVER PORT PSTN FAILOVER PORT
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