E1 R2 : R2_Q421_BLOCKED

[m.aissa]

Dear

I have a probleme about R2 channels Block (r2_q421_blocked), when channels are blocked, i shut/no shut under controller E1, the channels unblock and after a while they become block.

We use a 2800 (IOS 12.4) as a voice-gateway, connected to Huawei MA5600.

This is the conf of the E1 ports :

----------------------------

controller E1 0/0/0
 framing NO-CRC4
 ds0-group 0 timeslots 1-15,17-31 type r2-digital r2-compelled ani
 cas-custom 0
 debounce-time 10
 release-guard-time 10
 seizure-ack-time 30
 dnis-complete

Have you any idea about the message R2_Q421_BLOCKED? What is the reason? Is there any issue?

[M02@rt37]

Hi @m.aissa

As I concerned I upgraded my IOS and it was good after that.

[Ratheesh Kumar]

Hi there

I bet you are hitting this bug. 

E1 R2 configured voice port, intermittently stuck in clearfwd state - CSCtd74470

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCtd74470

Symptoms: Voice ports on gateways configured for E1 R2 intermittently get
stuck in the "clearfwd" state and can only be returned to normal operation
mode by manual intervention.

Conditions: When the issue occurs, the following states are observed by
examining the stuck port with show commands:

Router#sh vo po su | include clearfwd 0/3/0:1 24 r2-digital up up clearfwd
idle y
Show voice trace 0/3/0.1.24
0/3/0:1 24 State Transitions: timestamp (state, event) -> (state, event) ...
3440023.272 (R2_Q421_IDLE, E_HTSP_SETUP_REQ) -> 3440023.380
(R2_Q421_OG_SEIZE, E_DSP_SIG_1100) -> 3440047.816 (R2_Q421_OG_SEIZE_ACK,
E_R2_REG_ABORT_DIGIT_COLLECT) -> 3440047.816 (R2_Q421_OG_CLR_FWD,
E_DSP_DIALING_DONE) -> 3440048.816 (R2_Q421_OG_CLR_FWD, E_HTSP_EVENT_TIMER) -
> 3440050.816 (R2_Q421_WAIT_IDLE, E_HTSP_EVENT_TIMER) -> 3440050.816
(R2_Q421_WAIT_IDLE, E_DSP_SIG_1100) -> 3440050.820 (R2_Q421_BLOCKED,
E_DSP_SIG_1100) -> 3440069.960 (R2_Q421_BLOCKED, E_HTSP_RELEASE_REQ) ->
3440113.512 (R2_Q421_BLOCKED, E_DSP_SIG_1000) ->) ->

Workaround: Shut/No shut the controller or Busy Out the channel:

Router#sh vo po sum | include clearfwd 0/3/0:1 24 r2-digital up up clearfwd
idle y 0/2/0:1 21 r2-digital up up clearfwd idle y 0/2/0:1 29 r2-digital up
up clearfwd idle y 0/2/0:1 30 r2-digital up up clearfwd idle y
Router#conf t

Enter configuration commands, one per line. End with CNTL/Z:

Router(config)#control Router(config)#controll Router(config)#controller E1
0/2/0
Router(config-controller)#ds0 busyout 21,29,30,24 Router(config-controller)
#no ds0 busyout 21,29,30,24
Router(config-controller)#end
Router#sh vo po sum | include clearfwd
Router#
-->

Product:

(1)

Cisco 2800 Series Integrated Services Routers

Known Affected Releases:

(1)

12.4(25b)

Known Fixed Releases:

(122)

15.4(3)M

15.4(2)T1

15.4(2)T

15.4(2)CG

15.4(1)T2

15.4(1)T1

15.4(1)T

15.4(1)CG1

15.4(1)CG

15.3(3)XB12

15.3(3)M3

15.3(3)M2

15.3(3)M1

15.3(3)M

15.3(2)T4

15.3(2)T3

15.3(2)T2

15.3(2)T1

15.3(2)T

15.3(1)T4

15.3(1)T3

15.3(1)T2

15.3(1)T1

15.3(1)T

15.2(4)XB11

15.2(4)M6b

15.2(4)M6a

15.2(4)M6

15.2(4)M5

15.2(4)M4

15.2(4)M3

15.2(4)M2

15.2(4)M1

15.2(4)JB6

15.2(4)JB5m

15.2(4)JB5

15.2(4)JB4

15.2(4)JB3s

15.2(4)JB3b

15.2(4)JB3a

15.2(4)JB3

15.2(4)JB1

15.2(4)JB

15.2(4)JAZ

15.2(4)JA1

15.2(4)JA

15.2(4)GC2

15.2(4)GC1

15.2(4)GC

15.2(3)T4

15.2(3)T3

15.2(3)T2

15.2(3)T1

15.2(3)T

15.2(3)GCA1

15.2(3)GCA

15.2(3)GC1

15.2(3)GC

15.2(2)T4

15.2(2)T3

15.2(2)T1

15.2(2)T

15.2(2)JB3

15.2(2)JB2

15.2(2)JB

15.2(2)JAX

15.2(2)JA1

15.2(2)JA

15.2(1)T4

15.2(1)T2

15.2(1)T1

15.2(1)T

15.1(24.6.26)PIL13

15.1(4)M9

15.1(4)M8

15.1(4)M7

15.1(4)M6

15.1(4)M5

15.1(4)M4

15.1(4)M3

15.1(4)M2

15.1(4)M1

15.1(4)M

15.1(4)GC2

15.1(4)GC1

15.1(3)T4

15.1(3)T3

15.1(3)T2

15.1(3)T1

15.1(3)T

15.1(2)T5

15.1(2)T4

15.1(2)T3

15.1(2)T2

15.1(2)T1

15.1(2)T

15.1(1.7.1)PIA13

15.1(1)XB1

15.1(1)T5

15.1(1)T4

15.1(1)T3

15.1(1)T1

15.1(1)T

15.1(0.20)T

15.1(0.2.12)PIB13

15.1(0.0.10)PIL14

15.0(1)M9

15.0(1)M8

15.0(1)M7

15.0(1)M4

15.0(1)M2

15.0(1)M10

15.0(1)M1.4

12.4(24)T9

12.4(24)T8

12.4(24)T7

12.4(24)T6

12.4(24)T12

12.4(24)T11

12.4(24)T10

12.4(24)MDA13

12.4(15)T15

Hope this helps!

Cheers
Rath!


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