Hello everyone,
I am having a problem on site that I am hoping the community can provide some insight/ideas on what could be the problem.
Currently, there are some NVX endpoints that act as video receivers and receive video streams from a transmitter that we have on site. Randomly, some of these endpoints stop receiving content, and the only way to bring the video stream back is to shut and then noshut the switchport that they are on. When this happens they never lose IP connectivity to the transmitter, since logging into the transmitter lets us see that all the endpoints are online and reachable-just unable to receive the stream.
Looking at the interface statistics for a switchport that has an endpoint that was unable to stream I saw that the total output drops and OutDiscards were extremely high compared to other interfaces that have functioning endpoints. I have attached the output below:
#sh int gi1/0/6
GigabitEthernet1/0/6 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is cc7f.7653.9406 (bia cc7f.7653.9406)
Description: RNV2-1_RNVX2-1
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 116/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is on, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:07, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 1857066562
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 251000 bits/sec, 22 packets/sec
5 minute output rate 456834000 bits/sec, 42463 packets/sec
27905891 packets input, 7337032357 bytes, 0 no buffer
Received 7847141 broadcasts (7278924 multicasts)
3 runts, 0 giants, 0 throttles
147 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 7278924 multicast, 0 pause input
0 input packets with dribble condition detected
274873830602 packets output, 370586764056023 bytes, 0 underruns
Output 77350395 broadcasts (0 multicasts)
0 output errors, 0 collisions, 2 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
sh int gi1/0/6 counter errors
Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize OutDiscards
Gi1/0/6 0 0 0 144 3 1857066562
Port Single-Col Multi-Col Late-Col Excess-Col Carri-Sen Runts
Gi1/0/6 0 0 0 0 3
Multicast and IGMP Snooping are also enablebled on the VLAN these endpoints are on (VLAN 100) using the following commands:
ip igmp snooping querier
ip igmp snooping vlan 100 querier version 2
ip igmp snooping vlan 100 immediate-leave
Can anyone provide any insight on why the endpoints are suddenly unable to stream? Most of them are working, but suddenly 1 or 2 will lose their streams intermittently. Im concerned on the total output drops and OutDiscards on the gi1/0/6 interface. I checked the interface for another endpoint that was not working and the one thing they have in common is the output drops on their ports. Im not sure if it has something to do with the buffer space in the switchport, or if I need to tweak any QoS settings.
A bit more about the network and topology, these are C9300 Catalysts (qty 7) with Fiber uplinks to a core C9500 in a star topology in an etherchannel.
Thank You everyone.
