Hi James You can use sh buffers and sh controller g0/2 for more info and then try and tune buffers, but this doesn't help a lot usually. Another thing to check would be for microbursts using the old rate limit trick setting a policer with exceed action transmit Then you can check to see if you are overflowing therate limit bucket as sign of microburst. Like maybe due to speed steps 10G/1G. Overruns are a sign that the router can't handle the traffic coming in and may be due to traffic levels or traffic types that take longer to process. Flow control could help but I see unsupported listed on the interface and admit I am not well versed on the 3925 as a platform Have you tried a reboot ? I have seen routers get out of whack that magically return to form after a reboot..
Brian Turnbow Il giorno gio 30 gen 2025 alle ore 14:41 james list via cisco-nsp < [email protected]> ha scritto: > Dear expert > I'm trying to get any useful insight and I can also understand not polite > comments... > > We've a customer which is experiencing multicast gaps on feed A and we've > identified an old C3925-SPE200 in a remote location (hence difficult to be > replaced in a manner) which is experiencing input errors/overrun also on > low bandwidth and packet rate. > The customer has the same kind of device in another remote location > receiving the same multicast feed (feed B) without issues. > I think these gaps are due to packet dropped ... customer has also tried to > move interface from g0/1 to g0/2 but no improvement has obtained. > > Any idea what could be the reason ? > > Thanks in advance > James > > xxx>sh inventory > NAME: "CISCO3925-CHASSIS", DESCR: "CISCO3925-CHASSIS" > PID: CISCO3925-CHASSIS , VID: V02, SN: FCZxxx > > NAME: "Cisco Services Performance Engine 200 for Cisco 3900 ISR on Slot 0", > DESCR: "Cisco Services Performance Engine 200 for Cisco 3900 ISR" > PID: C3900-SPE200/K9 , VID: V04 , SN: FOC160320B7xxx > > NAME: "C3900 AC Power Supply 1", DESCR: "C3900 AC Power Supply 1" > PID: PWR-3900-AC , VID: V03, SN: SNIxxx > > NAME: "C3900 AC Power Supply 2", DESCR: "C3900 AC Power Supply 2" > PID: PWR-3900-AC , VID: V03 , SN: QCSxxx > > > xxx>sh int g0/2 > GigabitEthernet0/2 is up, line protocol is up > Hardware is iGbE, address is 442b.0316.9302 (bia 442b.0316.9302) > Description: To Market > MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, > reliability 255/255, txload 1/255, rxload 2/255 > Encapsulation 802.1Q Virtual LAN, Vlan ID 1., loopback not set > Keepalive set (10 sec) > Full Duplex, 1Gbps, media type is RJ45 > output flow-control is unsupported, input 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 01:18:46 > Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0 > Queueing strategy: fifo > Output queue: 0/40 (size/max) > 30 second input rate 9004000 bits/sec, 2628 packets/sec > 30 second output rate 9000 bits/sec, 7 packets/sec > 7936911 packets input, 4224448667 bytes, 0 no buffer > Received 7914597 broadcasts (7218973 IP multicasts) > 0 runts, 0 giants, 0 throttles > 56932 input errors, 0 CRC, 0 frame, 56932 overrun, 0 ignored > 0 watchdog, 7914597 multicast, 0 pause input > 30904 packets output, 2951099 bytes, 0 underruns > 0 output errors, 0 collisions, 0 interface resets > 158 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 > > > interface GigabitEthernet0/2 > description To Market > no ip address > load-interval 30 > duplex full > speed 1000 > hold-queue 2000 in > ! > interface GigabitEthernet0/2.90 > description VLAN multicast > encapsulation dot1Q 90 > ip address xx.xx.221.1 255.255.255.0 > ip pim query-interval 5 > ip pim bsr-border > ip pim dense-mode proxy-register list xx > ip multicast boundary xx > ip nat outside > ip virtual-reassembly in > ! > interface GigabitEthernet0/2.1683 > description To market flex vpn > encapsulation dot1Q 1683 > ip address 10.xx.xx.85 255.255.255.252 > ip access-group CRYPTO-xxx > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
