ICM 8.0 Router MDS process not in service

[SangHyun Lee]

The customer is deploying UCCE(ICMv.8.0SR2) on UCS base.

Actually, I tried to install one router with a single mode first, at that time MDS was working without any issue.

and tried to install routers with dual mode and the MDS was working well.

(CU configured “duplexed mode” for “Fault Tolerance Mode”)

however, I tried to shutdown one of Router(SideA or B) for redundancy test, MDS was to be "Out of Service".

Service | Side A | Side B | MDS Status

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

Router  | Active | Active | Sucess

Router  | Active | Stop   | Fail (Synchronizer supending operation)

Router  | Stop   | Active | Fail (Synchronizer supending operation)

[geoff]

I don't know what this means:

(CU configured “duplexed mode” for “Fault Tolerance Mode”)

Is this a System IPCC?

Shut everything down.

Start LoggerA, then RouterA. When RouterA router window shows "synchronization hold off disabled", watch this window as you start RouterB. The two should communicate and RouterA should start loading the config from LoggerA into memory.

If this does not work, go over setup again. Something is misconfigured in the private link.

Regards,

Geoff

[kimv]

You've not given us enough information here to assist or evaulate fault tollerance.

How many PGs are configured in this environment?
How many are active?

What are the results in the RTR log to the TOS communications between the RTRs?

In order to properly evaluate the fail over you are describing according to UCCE fault tollerance design we'd need to have the following;

RTR logs
NM logs with /nobin flag
MDS logs with /nobin flag
CCAG logs with /nobin flag

You also probably already have reviewed the following, but this is the SRND for UCCE 8.0x / fault tollerance is discussed beginning on page 137

http://www.cisco.com/en/US/docs/voice_ip_comm/cust_contact/contact_center/ipcc_enterprise/ipccenterprise8_0_1/design/guide/uccesrnd80.pdf

[manoj.k.chokkakula]

Hi Geoff, kimv,

I am also having the same issue. What he meant by the below statement is DUring the setup there will be option as Fault Tolerance Mode (Simplex/Duplex). Here he and my self selected Duplex mode)

(CU configured “duplexed mode” for “Fault Tolerance Mode”)

I did the same way of shutting down all the process, and tried first loggerA, then RouterA. it didnt get a msg as  "synchronization hold off disabled" under Router.

what i see in MDS window is below

3:31:02 mds      Client tsyr registered with handle 48.
3:31:02 mds      Client tsyr started.
3:31:10 mds      Client nmlogger registered with handle 41.
3:31:10 mds      Client nmlogger started.
3:31:11 mds      Client hlgr registered with handle 132.
3:31:11 mds      Client hlgr started.
3:31:11 mds      Client rcv registered with handle 51.
3:31:11 mds      Client rcv started.
3:31:12 mds      Client csfs registered with handle 34.
3:31:12 mds      Client csfs started.
3:31:12 mds      Client rpl registered with handle 129.
3:31:12 mds      Client rpl started.
3:31:16 mds      Client clgr registered with handle 36.
3:31:16 mds      Client clgr started.
3:31:30 mds      Synchronizer suspending operation.
3:33:30 mds      Synchronizer attempting reinitialization.
3:34:00 mds      Synchronizer suspending operation.

If i start the routerB immediately all will be in service. Please advise.

[Chintan Gajjar]

How many PGs you have configured?

and are they up?

there is beutiful mechanism behind who will take charge of enable synchroniser role between MDS pairs.

regards

Chintan

[manoj.k.chokkakula]

Agreed Chintan, that mechanism is really awesome.  

Just got your msg while i typed at the same time. 

Thank you.

[manoj.k.chokkakula]

I got the problem. Thanks to Geoff .Its him who explained in another post which is cause for this problem. different question but Same Answer 

Its Device Majority which is causing the problem.

Routers in DUPLEX,Configured 10 , Made Active 2PG  .

To become SIMPLEX, Router needs to be in ISOLATED ENABLED , this again depends on Device Majority (atleast 50%). 

Based on device Majority the Routers will never go simplex as the 8PGs didnt respond back to Router that other Router went down. so more than 50% didnt respond back. So due to this RouterA/B  will be in ISOLATED DISABLED thats why MDS will be in out of service.

So for this problem

Service | Side A | Side B | MDS Status

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

Router  | Active | Active | Sucess

Router  | Active | Stop   | Fail (Synchronizer supending operation) (Device Majority less than 50% to become SIMPLEX so Router is in ISOLATED DISABLED)

Router  | Stop   | Active | Fail (Synchronizer supending operation)(Device Majority less than 50% to become SIMPLEX so Router is in ISOLATED DISABLED)