9600 led indicating port beacon

[Ruhtra]

I have a pair of 9606 switches configured for VSS.  They are connected to a pair of N9K-C93180YC-FX over port-channel 1 in a server room.  And connected to another pair of N9K over port-channel 2 in another server room.  Each server room has 4 connections in the port-channel.  The status light for two of each of the four connections is blinking amber-green, indicating port beacon.  What is port beacon in this instance?  There is not a port beacon command to turn on/off.

[Leo Laohoo]

All four are in a port-channel. 

Can I see the output to the command "sh interface Twe 1/0/44 controll"?

[Ruhtra]

twe1/2/0/44 and 2/2/0/44 are indicating port beacon.  In next response I will show one that is not indicating port beacon.

SWITCH#sho int twe1/2/0/44 controller
TwentyFiveGigE1/2/0/44 is up, line protocol is up (connected)
Hardware is Twenty Five Gigabit Ethernet, address is c44d.84e2.89ab (bia c44d.84e2.89ab)
Description: KZP-PA259-SSW02 (eth 1/48)
MTU 1500 bytes, BW 25000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 3/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 25Gb/s, link type is force-up, media type is SFP-10/25GBase-LR
Fec is off
input flow-control is on, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:19, output 00:00:08, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 838365
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 17501000 bits/sec, 5765 packets/sec
5 minute output rate 374627000 bits/sec, 163513 packets/sec
278755226881 packets input, 121312827626875 bytes, 0 no buffer
Received 1035042429 broadcasts (239888014 multicasts)
0 runts, 1117559371 giants, 0 throttles
1117559371 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 239888014 multicast, 0 pause input
0 input packets with dribble condition detected
4028494674925 packets output, 1211573393474335 bytes, 0 underruns
Output 2565545309 broadcasts (5947644296 multicasts)
0 output errors, 0 collisions, 6 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
Transmit TwentyFiveGigE1/2/0/44 Receive
1211573393474335 Total bytes 121312827626875 Total bytes
4019981485320 Unicast frames 277720184452 Unicast frames
1210208110130220 Unicast bytes 121212285911465 Unicast bytes
5947644296 Multicast frames 239888014 Multicast frames
1152347101100 Multicast bytes 22035494765 Multicast bytes
2565545309 Broadcast frames 795154415 Broadcast frames
212936242723 Broadcast bytes 78506220645 Broadcast bytes
0 System FCS error frames 0 IpgViolation frames
0 MacUnderrun frames 0 MacOverrun frames
0 Pause frames 0 Pause frames
0 Cos 0 Pause frames 0 Cos 0 Pause frames
0 Cos 1 Pause frames 0 Cos 1 Pause frames
0 Cos 2 Pause frames 0 Cos 2 Pause frames
0 Cos 3 Pause frames 0 Cos 3 Pause frames
0 Cos 4 Pause frames 0 Cos 4 Pause frames
0 Cos 5 Pause frames 0 Cos 5 Pause frames
0 Cos 6 Pause frames 0 Cos 6 Pause frames
0 Cos 7 Pause frames 0 Cos 7 Pause frames
0 Oam frames 0 OamProcessed frames
0 Oam frames 0 OamDropped frames
15035838969 Minimum size frames 1458337 Minimum size frames
1005122093640 65 to 127 byte frames 64655320118 65 to 127 byte frames
1560357497728 128 to 255 byte frames 56173379886 128 to 255 byte frames
869874764057 256 to 511 byte frames 27571474821 256 to 511 byte frames
429094739457 512 to 1023 byte frames 110738791677 512 to 1023 byte frames
138745673558 1024 to 1518 byte frames 11791809661 1024 to 1518 byte frames
10264067519 1519 to 2047 byte frames 8940551752 1519 to 2047 byte frames
0 2048 to 4095 byte frames 0 2048 to 4095 byte frames
0 4096 to 8191 byte frames 0 4096 to 8191 byte frames
0 8192 to 16383 byte frames 0 8192 to 16383 byte frames
0 16384 to 32767 byte frame 0 16384 to 32767 byte frame
0 > 32768 byte frames 0 > 32768 byte frames
0 Late collision frames 0 SymbolErr frames
838365 Excess Defer frames 0 Collision fragments
0 Good (1 coll) frames 0 ValidUnderSize frames
0 Good (>1 coll) frames 0 InvalidOverSize frames
0 Deferred frames 1117559371 ValidOverSize frames
0 Gold frames dropped 0 FcsErr frames
0 Gold frames truncated
0 Gold frames successful
0 1 collision frames
0 2 collision frames
0 3 collision frames
0 4 collision frames
0 5 collision frames
0 6 collision frames
0 7 collision frames
0 8 collision frames
0 9 collision frames
0 10 collision frames
0 11 collision frames
0 12 collision frames
0 13 collision frames
0 14 collision frames
0 15 collision frames
0 Excess collision frames

LAST UPDATE 3193 msecs AGO

[MHM Cisco World]

https://community.cisco.com/t5/switching/what-is-excess-defer-frames/td-p/3017695

We close to know what happened 

Check link about deffer frames 

MHM

[Ruhtra]

Twe1/1/0/44 and twe2/1/0/44 are NOT indicating port beacon.

SWITCH#sho int twe1/1/0/44 controller
TwentyFiveGigE1/1/0/44 is up, line protocol is up (connected)
Hardware is Twenty Five Gigabit Ethernet, address is c44d.841f.daab (bia c44d.841f.daab)
Description: KZP-PA259-SSW01 (eth 1/48)
MTU 1500 bytes, BW 25000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 31/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 25Gb/s, link type is force-up, media type is SFP-10/25GBase-LR
Fec is off
input flow-control is on, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:11, output 00:00:01, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 23906801925
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 25689000 bits/sec, 9293 packets/sec
5 minute output rate 3093648000 bits/sec, 1229497 packets/sec
311117428495 packets input, 131193104581368 bytes, 0 no buffer
Received 1260386706 broadcasts (274899445 multicasts)
0 runts, 191232434 giants, 0 throttles
191232434 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 274899445 multicast, 0 pause input
0 input packets with dribble condition detected
32674692251807 packets output, 11081493416327377 bytes, 0 underruns
Output 383814263 broadcasts (8684751918 multicasts)
0 output errors, 0 collisions, 6 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
Transmit TwentyFiveGigE1/1/0/44 Receive
11081493416327377 Total bytes 131193104581368 Total bytes
32665623685626 Unicast frames 309857041789 Unicast frames
11080149733567149 Unicast bytes 131071358737642 Unicast bytes
8684751918 Multicast frames 274899445 Multicast frames
1294879242453 Multicast bytes 25434626289 Multicast bytes
383814263 Broadcast frames 985487261 Broadcast frames
48803517079 Broadcast bytes 96311217437 Broadcast bytes
0 System FCS error frames 0 IpgViolation frames
0 MacUnderrun frames 0 MacOverrun frames
0 Pause frames 0 Pause frames
0 Cos 0 Pause frames 0 Cos 0 Pause frames
0 Cos 1 Pause frames 0 Cos 1 Pause frames
0 Cos 2 Pause frames 0 Cos 2 Pause frames
0 Cos 3 Pause frames 0 Cos 3 Pause frames
0 Cos 4 Pause frames 0 Cos 4 Pause frames
0 Cos 5 Pause frames 0 Cos 5 Pause frames
0 Cos 6 Pause frames 0 Cos 6 Pause frames
0 Cos 7 Pause frames 0 Cos 7 Pause frames
0 Oam frames 0 OamProcessed frames
0 Oam frames 0 OamDropped frames
7456388759 Minimum size frames 1201886 Minimum size frames
2215972002778 65 to 127 byte frames 85582872013 65 to 127 byte frames
15599359957592 128 to 255 byte frames 52334329562 128 to 255 byte frames
7968833238668 256 to 511 byte frames 27177723049 256 to 511 byte frames
6076797658157 512 to 1023 byte frames 125945462895 512 to 1023 byte frames
793660621824 1024 to 1518 byte frames 6770755058 1024 to 1518 byte frames
12612384040 1519 to 2047 byte frames 13496316466 1519 to 2047 byte frames
0 2048 to 4095 byte frames 0 2048 to 4095 byte frames
0 4096 to 8191 byte frames 0 4096 to 8191 byte frames
0 8192 to 16383 byte frames 0 8192 to 16383 byte frames
0 16384 to 32767 byte frame 0 16384 to 32767 byte frame
0 > 32768 byte frames 0 > 32768 byte frames
0 Late collision frames 0 SymbolErr frames
23906801925 Excess Defer frames 0 Collision fragments
0 Good (1 coll) frames 0 ValidUnderSize frames
0 Good (>1 coll) frames 0 InvalidOverSize frames
0 Deferred frames 191232434 ValidOverSize frames
0 Gold frames dropped 0 FcsErr frames
0 Gold frames truncated
0 Gold frames successful
0 1 collision frames
0 2 collision frames
0 3 collision frames
0 4 collision frames
0 5 collision frames
0 6 collision frames
0 7 collision frames
0 8 collision frames
0 9 collision frames
0 10 collision frames
0 11 collision frames
0 12 collision frames
0 13 collision frames
0 14 collision frames
0 15 collision frames
0 Excess collision frames

LAST UPDATE 1077 msecs AGO

[Ruhtra]

Please ignore the discard errors.  We were exceeding the capabilities of an interface on the nexus, we moved the offending server to another host, and I had not rest the counters.