Greetings
I have been experiencing many total input drops on the HundredGig interfaces on my NCS 5001. I have several clients and at the moment I have not reported that the service is affected except for one service that reports frame loss.
RFC 2544 has been tested from this client and we have no problems but it continues to report Frame Loss in its service. And I would like to know the cause of these input drops to validate if it is indeed the cause of the service being affected, which I have my doubts because the other services are working without problems.
sh int hundredGigE 0/0/1/2 | i drop
Wed Jun 21 12:13:42.216 AST
24405975185 packets input, 6864249052979 bytes, 35931 total input drops
0 drops for unrecognized upper-level protocol
44005860090 packets output, 37449040319501 bytes, 0 total output drops
sh controllers hundredGigE 0/0/1/2 stats
Wed Jun 21 12:14:44.440 AST
Statistics for interface HundredGigE0/0/1/2 (cached values):
Ingress:
Input total bytes = 6872400949436
Input good bytes = 6872400949436
Input total packets = 24438274534
Input 802.1Q frames = 0
Input pause frames = 0
Input pkts 64 bytes = 695767
Input pkts 65-127 bytes = 10971370558
Input pkts 128-255 bytes = 9532460903
Input pkts 256-511 bytes = 670169638
Input pkts 512-1023 bytes = 511149567
Input pkts 1024-1518 bytes = 2385065442
Input pkts 1519-Max bytes = 367362666
Input good pkts = 24438274534
Input unicast pkts = 24438188900
Input multicast pkts = 85634
Input broadcast pkts = 0
Input drop overrun = 0
Input drop abort = 0
Input drop invalid VLAN = 0
Input drop invalid DMAC = 0
Input drop invalid encap = 0
Input drop other = 0
Input error giant = 0
Input error runt = 0
Input error jabbers = 0
Input error fragments = 0
Input error CRC = 0
Input error collisions = 0
Input error symbol = 0
Input error other = 0
Input MIB giant = 367362666
Input MIB jabber = 0
Input MIB CRC = 0
When I try to identify the input error I don't see any of the error or drops incrementing. On NCS all of the NP commands that verify drop on NP level don't work. Looking around in the community i found the following command that give me some information about what packet have been drop.
sh netio drops interface hundredGigE 0/0/1/2 location 0/RP0/CPU0
Wed Jun 21 12:21:38.998 AST
--------------------------------------------------------------------------------
Interface: HundredGigE0/0/1/2 (0x080002d0)
--------------------------------------------------------------------------------
Interface input drops: 3079701 pkts
Interface input errors: 0 pkts
Interface input unknown proto: 0 pkts
Interface output drops: 0 pkts
Interface output errors: 0 pkts
Node drop counts:
Caps <num> (Protocol <num> Chain):
-----------------------------------
DLL/function name Address Drop pkts Drop bytes
---------------------------------------- ---------- ---------- ----------
mpls <25> (mpls <13> decaps):
<unknown> 0x9401e664 3079701 370806997
I notice that this command show drops of MPLS packet but I cant pinpoint what could be the problem.
I would appreciate your help with any information you can give me on this matter.
