Cisco 3850 output drops bug. After referencing the following Cisco.

Cisco 3850 output drops bug 63ac (bia f09e. 1. 06E Platform: WS-C3850-48U Hello, I'm seeing output drops on an interface connected to a Wifi AP The switch uplink is 10G and the AP is connected to 2x1gi => Po N9K <-- Po=2x10G --> C3850 <-- Po=2x1G --> AP2802i My understanding is there's a kind of speed mismatch and too many pa Mar 29, 2016 · GigabitEthernet6/0/44 is up, line protocol is up (connected) Hardware is Gigabit Ethernet, address is f09e. I would also welcome comments on the qos config and reducing output packet drops. You can get some cushion if you tune€the buffers but it cannot guarantee a zero output drop scenario. 63dc. Every interface has by default 2 queues applied (in UADP devices), increasing the soft buffer multiplier just allows for those queues to use a larger (shared) soft buffer memory space. Randomly the adjacency will fail after the Palo is not seeing 4 hello. com Apr 2, 2017 · 165898 output errors, 0 collisions, 0 interface resets 0 unknown protocol drops GigabitEthernet2/0/26 is up, line protocol is up (connected) Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 18264 Output queue: 0/40 (size/max) 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 18264 output errors, 0 collisions, 0 interface The Catalyst 3650 / 3850 and I assume the 9300 series all report output drops in BYTES, not packets like 2960 / 3560 / 3750 / 4500 / 6500 did. Conditions: To confirm the output drops are because of egress buffer drops use "sh pl qos queue stats gigabitEthernet x/y/z" and look for "Drop-TH" counters. Jun 12, 2017 · 3. 63ac) MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, reliability 255/255, txload 1/255, rxload 72/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 1000Mb/s, media type is 10/100 Aug 29, 2017 · Good afternoon, i ran into the known issue with seeing output drops on some 3850 interfaces, especially when under load. Catalyst 3650/3850 report output drops in BYTES and not in PACKETS like every other Cisco product ever. 6 and now seeing OSPF failures every 2-4 days. Auto QOS is configured on this switch and we have tried removing the qos config on the ports having problem but it didn't change anything. That difference may help you re-evaluate the severity of these packet drops. May 10, 2016 · We have put in service a catalyst 3850-12XS running ver 03. That is 240MB of dropped data out of 2,553,933,400,511 bytes. Any else seeing this behavior? Palos are running 7. dropping 2 million bytes of data maybe not so much. it may not be the switch at all either it could be burst traffic from application traffic temporarily flooding the port filling the buffer up so it cant hold the traffic and has to drop it , interface could be overloaded as well check what its pushing on average when you see the drops what's Feb 15, 2018 · 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 2353000 bits/sec, 602 packets/sec 5 minute output rate 15850000 bits/sec, 1623 packets/sec 3975312442 packets input, 5107283679684 bytes, 0 no buffer Received 34726967 broadcasts (27553546 multicasts) Oct 16, 2018 · 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 144000 bits/sec, 37 packets/sec 5 minute output rate 34000 bits/sec, 27 packets/sec 1085074451 packets input, 1337552566403 bytes, 0 no buffer Received 431567 broadcasts (195566 multicasts) Mar 8, 2019 · Version: 3. 3. This document describes the queue structure and buffers on the Catalyst 3650/3850 platform and provides examples on how output drops are mitigated. I don't think you need to apply any policy-map in order to use soft buffers. So this output: Total output drops: 242002583 is not 242M dropped packets. James. 06. 6. 10 except for one t Cisco Bug ID CSCuu14019以前は、インターフェイスに「output drop」カウンタが表示されません。 ドロップを確認するには、「 show platform qos queue stats 」出力を実行します。 Mar 7, 2004 · Output drops are generally a result of interface over-subscription caused by many to one or a 10gig to 1gig transfer. 07. Cisco Troubleshoot Catalyst 3850 Output Drops. May 10, 2016 · Output drops and Output errors increment simultaneously in show interfaces when only output drops are expected. Aug 21, 2019 · Last input 00:00:18, output never, output hang never Last clearing of "show interface" counters 3w5d Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 959239 Queueing strategy: fifo Output queue: 0/40 (size/max) 30 second input rate 6068000 bits/sec, 2450 packets/sec 30 second output rate 18567000 bits/sec, 1655 packets/sec Jul 14, 2016 · CSWTRE-BF01(config-if)#service-policy output vsan-traffic. com article, i applied the work around to tweak the softmax buffer, which resolved the Dec 5, 2017 · I see multiple instances where people have solved their output drop issues on the 3850 by following the steps in the link, included again below. From a performance point Feb 7, 2018 · 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 2353000 bits/sec, 602 packets/sec 5 minute output rate 15850000 bits/sec, 1623 packets/sec 3975312442 packets input, 5107283679684 bytes, 0 no buffer Received 34726967 broadcasts (27553546 multicasts) See full list on cisco. 6 is pretty stable not ruling out a bug but its definitely one of the better versions currently. 03E and we have noted that in certain ports, there is high output drops. dropping 2 million packets might be a big deal. After referencing the following Cisco. Then it takes 20-30 minutes for the adjacency to come back. Jan 26, 2018 · Version: 3. Thanks. I tried reducing the priority percentage and queue-buffers ratio to see if that was causing the problem but without success. Please can you suggest why the service policy is not being applied. 06E Platform: WS-C3850-48U Hello, I'm seeing output drops on an interface connected to a Wifi AP The switch uplink is 10G and the AP is connected to 2x1gi => Po N9K <-- Po=2x10G --> C3850 <-- Po=2x1G --> AP2802i My understanding is there's a kind of speed mismatch and too many pa May 31, 2018 · Recently started upgrading our 3850's to 16. Interface buffers are a limited resource and can only absorb a burst up to a point after which packets can drop. xamvl ylawexw jdigy jova doexflbq akjcgou rmnfi wzfdl nsax oimktt dotb pwcmc tqgjz luj gtzwn