Dear Friend, Still flapping is occaring.this is the ping over this link. regular interval traffic delay and drop can be shows every 15 minut intervals. Normal delay time = 2s delay time When issue is happening = more than 1000ms Reply from 10.13.0.9: bytes=32 time=3ms TTL=251 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Reply from 10.13.0.9: bytes=32 time=3ms TTL=251 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Reply from 10.13.0.9: bytes=32 time=3ms TTL=251 Reply from 10.13.0.9: bytes=32 time=211ms TTL=251 Reply from 10.13.0.9: bytes=32 time=135ms TTL=251 Reply from 10.13.0.9: bytes=32 time=435ms TTL=251 Reply from 10.13.0.9: bytes=32 time=382ms TTL=251 Reply from 10.13.0.9: bytes=32 time=108ms TTL=251 Reply from 10.13.0.9: bytes=32 time=286ms TTL=251 Reply from 10.13.0.9: bytes=32 time=282ms TTL=251 Reply from 10.13.0.9: bytes=32 time=181ms TTL=251 Reply from 10.13.0.9: bytes=32 time=87ms TTL=251 Reply from 10.13.0.9: bytes=32 time=189ms TTL=251 Reply from 10.13.0.9: bytes=32 time=146ms TTL=251 Reply from 10.13.0.9: bytes=32 time=57ms TTL=251 Reply from 10.13.0.9: bytes=32 time=366ms TTL=252 Reply from 10.13.0.9: bytes=32 time=414ms TTL=251 Reply from 10.13.0.9: bytes=32 time=807ms TTL=251 Reply from 10.13.0.9: bytes=32 time=247ms TTL=251 Reply from 10.13.0.9: bytes=32 time=74ms TTL=251 Reply from 10.13.0.9: bytes=32 time=19ms TTL=251 Reply from 10.13.0.9: bytes=32 time=420ms TTL=251 Reply from 10.13.0.9: bytes=32 time=378ms TTL=251 Reply from 10.13.0.9: bytes=32 time=289ms TTL=251 Reply from 10.13.0.9: bytes=32 time=262ms TTL=251 Reply from 10.13.0.9: bytes=32 time=1005ms TTL=251 Reply from 10.13.0.9: bytes=32 time=3ms TTL=251 Request timed out. Reply from 10.13.0.9: bytes=32 time=2ms TTL=252 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Reply from 10.13.0.9: bytes=32 time=2ms TTL=251 Please advice Prageeth ... View more

Dear Friend, Ok. we will set it like that and let you know the status soon. Thanks Prageeth ... View more

Hello Giuseppe, hearwith attached sh int pos .. please see it!! My friend, 1st i change clock to Internal at Cisco 7604 side. issue is exist. but no any alarms generated. then 2nd  i set to original and change clock to Internal on Cisco 12406 side. then issue is exist and many alarms were generated (transmmission alarms). and traffic goes down for a 5 minute time.So we set all to original state. But 1st case we didnt reset port (shutdown and up). Thanks for your help Prageeth ... View more

Hello Giuseppe, We have done the changes as you describe. But still flapping is there. Does it need shutdown and no shutdown to apply the clock setting. Waiting your feedback. Thanks Prageeth ... View more

Dear Giuseppe, Thanks for your help. No SDH device in middle. in this case do we need to setup Interal - Line mode. Thanks Prageeth ... View more

Hello, Can we change one side in to INTERNAL when the router is sending traffic and in productions state. Are there any risk my friend. Prageeth ... View more

Hello, Please refer to attachment.both sh cont is attached. Thanks you very much Cisco 12406 core Router xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx POS2/2/2 SECTION   LOF = 0          LOS    = 0                            BIP(B1) = 1096 LINE   AIS = 2425       RDI    = 57         FEBE = 4296782    BIP(B2) = 37334688 PATH   AIS = 2376       RDI    = 2323       FEBE = 1814026    BIP(B3) = 11892092   LOP = 2530       NEWPTR = 0          PSE  = 0          NSE     = 0 Active Defects: None Active Alarms:  None Alarm reporting enabled for: SF SLOS SLOF B1-TCA B2-TCA PLOP B3-TCA Framing: SDH APS   COAPS = 6677       PSBF = 3554        State: PSBF_state = False   ais_shut = TRUE   Rx(K1/K2): 00/00  S1S0 = 02, C2 = 16   Remote aps status (none); Reflected local aps status (none) CLOCK RECOVERY   RDOOL = 0           State: RDOOL_state = False PATH TRACE BUFFER : STABLE   Remote hostname : GPAS-MEDG-004             Remote interface: POS3/2/0        Remote IP addr  : 10.13.1.2         Remote Rx(K1/K2): 00/00  Tx(K1/K2): 00/00 BER thresholds:  SF = 10e-3  SD = 10e-6 TCA thresholds:  B1 = 10e-6  B2 = 10e-6  B3 = 10e-6 Optical Power Monitoring Module temperature    =  26.968 C Transmit Bias Current =  3548 uAmp Tx Output Power       =  -10 dBm  (750 in units of 0.1 uW) Rx Output Power       =  -11 dBm (711 in units of 0.1 uW) xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Edge router -cisco 7604 ... View more

Hello, Thanks for support. We increased halding time upto 120s. Now IS IS log is not over there. But still issue is exist. How change cloking in SDH. is it in router or have to change those with STM receiver and all. Please respond. Thanks ... View more

Thanks for your comments. But we check SNMP using MRTG and PRTG.further we notice that every flap, ping delays go beyond 1000ms with few packet drops. otherwice it is 2ms. IS-IS protocol logs , hols time expired and new ajacency created/!!!!. Our customers also expericancing this traffic pattern and actucally they are suffering. So traffic delay is expericncing by us. please comment. ... View more