3850 SW - Interfaces Receiving Multicast errors

[Quintin.Mayo]

Hi,

We have a 3850 model switch we have five interfaces experiencing multicast errors for some reason.  Four interfaces involved are trunk ports and the fifth is an access port. I upgraded the device IOS to the latest IOS cat3k_caa-universalk9.16.12.05b. SPA.bin code. This did not mitigate the multicast issue. I checked to see if multicast routing was enabled on the device and found it wasn't. But, there is a policy-map and class-map configured for multicast end station traffic. Three interfaces belong to two different port channels.  how can we determine where the source of the traffic is coming from? I conducted some troubleshooting below without success.  Any assistance will be greatly appreciated!

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CORE#sh ip pim neighbor
PIM Neighbor Table
Mode: B - Bidir Capable, DR - Designated Router, N - Default DR Priority,
P - Proxy Capable, S - State Refresh Capable, G - GenID Capable,
L - DR Load-balancing Capable
Neighbor Interface Uptime/Expires Ver DR
Address Prio/Mode

CORE#sh ip mroute
IP Multicast Forwarding is not enabled.
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry, E - Extranet,
X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
U - URD, I - Received Source Specific Host Report,
Z - Multicast Tunnel, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group,
G - Received BGP C-Mroute, g - Sent BGP C-Mroute,
N - Received BGP Shared-Tree Prune, n - BGP C-Mroute suppressed,
Q - Received BGP S-A Route, q - Sent BGP S-A Route,
V - RD & Vector, v - Vector, p - PIM Joins on route,
x - VxLAN group, c - PFP-SA cache created entry,
* - determined by Assert
Outgoing interface flags: H - Hardware switched, A - Assert winner, p - PIM Join
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode

CORE#sh ip pim interface

Address Interface Ver/ Nbr Query DR DR
Mode Count Intvl Prior

CORE#debug ip mpacket
This command is no longer supported.
Use "debug ip mfib ps"

CORE#debug ip mfib ps
MFIB IPv4 no default table available for ps debugging

CORE#sh ip mroute active
Use "show ip mfib active" to get better response time for a large number of mroutes.

Active IP Multicast Sources - sending >= 4 kbps

CORE#show ip mfib active
IPv4 Multicast Default Forwarding Table not found

CORE#sh ip igmp group
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last Reporter Gr
oup Accounted

CORE#sh ip traffic
IP statistics:
Rcvd: 615199 total, 2360554 local destination
0 format errors, 0 checksum errors, 0 bad hop count
0 unknown protocol, 0 not a gateway
0 security failures, 0 bad options, 0 with options
Opts: 0 end, 0 nop, 0 basic security, 0 loose source route
0 timestamp, 0 extended security, 0 record route
0 stream ID, 0 strict source route, 0 alert, 0 cipso, 0 ump
0 other, 0 ignored
Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble
0 fragmented, 0 fragments, 0 couldn't fragment
0 invalid hole
Bcast: 573032 received, 72 sent
Mcast: 0 received, 0 sent
Sent: 4454421 generated, 138738935 forwarded
Drop: 377 encapsulation failed, 0 unresolved, 383120691 no adjacency
0 no route, 0 unicast RPF, 0 forced drop, 0 unsupported-addr
0 options denied, 0 source IP address zero

ICMP statistics:
Rcvd: 0 format errors, 0 checksum errors, 0 redirects, 2500 unreachable
296917 echo, 0 echo reply, 0 mask requests, 0 mask replies, 0 quench
0 parameter, 0 timestamp, 0 timestamp replies, 0 info request, 0 other
0 irdp solicitations, 0 irdp advertisements
0 time exceeded, 0 info replies
Sent: 2423307 redirects, 13361 unreachable, 0 echo, 296917 echo reply
0 mask requests, 0 mask replies, 0 quench, 0 timestamp, 0 timestamp replies
0 info reply, 6 time exceeded, 0 parameter problem
0 irdp solicitations, 0 irdp advertisements

UDP statistics:
Rcvd: 2027433 total, 0 checksum errors, 307129 no port 0 finput
Sent: 1695531 total, 43634 forwarded broadcasts

OSPF statistics:
Last clearing of OSPF traffic counters never
Rcvd: 0 total, 0 checksum errors
0 hello, 0 database desc, 0 link state req
0 link state updates, 0 link state acks
Sent: 0 total
0 hello, 0 database desc, 0 link state req
0 link state updates, 0 link state acks

PIMv2 statistics: Sent/Received
Total: 0/0, 0 checksum errors, 0 format errors
Registers: 0/0 (0 non-rp, 0 non-sm-group), Register Stops: 0/0, Hellos: 0/0
Join/Prunes: 0/0, Asserts: 0/0, grafts: 0/0
Bootstraps: 0/0, Candidate_RP_Advertisements: 0/0
Queue drops: 0
State-Refresh: 0/0

IGMP statistics: Sent/Received
Total: 0/0, Format errors: 0/0, Checksum errors: 0/0
Host Queries: 0/0, Host Reports: 0/0, Host Leaves: 0/0
DVMRP: 0/0, PIM: 0/0
Queue drops: 0
Report VRF mismatch drops: 0

TCP statistics:
Rcvd: 33704 total, 0 checksum errors, 300 no port
Sent: 25299 total

EIGRP-IPv4 statistics:
Rcvd: 0 total
Sent: 0 total

ARP statistics:
Rcvd: 7748272 requests, 1086 replies, 0 reverse, 0 other
Sent: 754208 requests, 591973 replies (117 proxy), 0 reverse
Drop due to input queue full: 0

******************************************************************************

CORE#sh int gi 1/0/34
GigabitEthernet1/0/34 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 5cfc.66bd.2e22 (bia 5cfc.66bd.2e22)
Description: SWCLUSTER uplink
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, 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 00:00:06, output 00:00:04, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 461000 bits/sec, 48 packets/sec
5 minute output rate 49000 bits/sec, 7 packets/sec
235694309 packets input, 260449440447 bytes, 0 no buffer
Received 722779 broadcasts (326331 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 326331 multicast, 0 pause input
0 input packets with dribble condition detected
13002897 packets output, 8865454293 bytes, 0 underruns
Output 1100828 broadcasts (0 multicasts)
0 output errors, 0 collisions, 2 interface resets
53088 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

CORE#sh int gi 1/0/37
GigabitEthernet1/0/37 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 5cfc.66bd.2e25 (bia 5cfc.66bd.2e25)
Description: voice sw uplink
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, 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 00:00:00, 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: 14452
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 98000 bits/sec, 36 packets/sec
5 minute output rate 51000 bits/sec, 47 packets/sec
28101963 packets input, 11884368564 bytes, 0 no buffer
Received 2705060 broadcasts (2533450 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 2533450 multicast, 0 pause input
0 input packets with dribble condition detected
41209915 packets output, 16624674228 bytes, 0 underruns
Output 9298504 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

CORE#sh int gi 1/0/39
GigabitEthernet1/0/39 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 5cfc.66bd.2e27 (bia 5cfc.66bd.2e27)
Description: SW4 uplink
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, 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 00:00:17, output 00:00:04, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 95969024
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 251000 bits/sec, 44 packets/sec
5 minute output rate 241000 bits/sec, 13 packets/sec
74001572 packets input, 51150048834 bytes, 0 no buffer
Received 2112287 broadcasts (126596 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 126596 multicast, 0 pause input
0 input packets with dribble condition detected
195487744 packets output, 265558402549 bytes, 0 underruns
Output 3475183 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

CORE#sh int gi 1/0/40
GigabitEthernet1/0/40 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 5cfc.66bd.2e28 (bia 5cfc.66bd.2e28)
Description: SW4 uplink
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, 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 00:00:14, output 00:00:02, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 97153306
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 765000 bits/sec, 97 packets/sec
5 minute output rate 403000 bits/sec, 108 packets/sec
490587570 packets input, 561176549169 bytes, 0 no buffer
Received 3585556 broadcasts (3337516 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 3337516 multicast, 0 pause input
0 input packets with dribble condition detected
415124565 packets output, 303921967577 bytes, 0 underruns
Output 3761749 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

CORE#sh int gi 1/0/11
GigabitEthernet1/0/11 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 5cfc.66bd.2e0b (bia 5cfc.66bd.2e0b)
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/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 never, 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: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 3000 bits/sec, 4 packets/sec
5 minute output rate 6000 bits/sec, 3 packets/sec
4698889 packets input, 590510497 bytes, 0 no buffer
Received 924306 broadcasts (8875 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 8875 multicast, 0 pause input
0 input packets with dribble condition detected
4555022 packets output, 586296480 bytes, 0 underruns
Output 0 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

[pieterh]

first, It's not clear to me what you mean with "Interfaces Receiving Multicast errors"

do you mean this apears in logging on the switch ? -> please post some output
second, you do not post any configuration of the switch, is routing enabled on the switch ?

[Leo Laohoo]

Look at those Total Output Drops!