例: Cat9300#show platform software fed active punt cpuq all Punt CPU Q Statistics ===== CPU Q Id : 0 CPU Q Name. I saw that there were similar issues with Cisco ASR devices and a customer poller was created. 06E RELEASE SOFTWARE (fc1)) when we checked the software we noticed that software version effected with vstack vulnerability and we want to upgrade to latest stable version afterI have checked the. We have a cisco 3850 which version is 03. 03aSwitching . 0. I am looking to others who may have taken the leap and if they got the expected result. 5E/3. 0". 06 to 16. 3 cli command "show process cpu sorted | append nvram:. I'm using to SFP interface only. This requires the switch to receive the DHCP Discover and punt this packet up to its CPU to process. #sh proc cpu sort | e 0. If the IP input process uses unusually high CPU resources, the router is process-switching a lot of IP traffic. 3850-2#show processes cpu detailed process fed sorted | ex 0. Our initial set up when the issue suddenly occured: DHCP Server (Core Switch) ---> IP phone (vlan812) ---> PC (vlan808) All IP phones are ok. The flash: directory is read only. sh processes memory platform sorted location switch 1 rp0 (Page 1 only) The switch/stack is running on 16. action 0. 93% 17. Core 1: CPU utilization for five seconds: 99%; one minute: 98%; five minutes: 98%Third, upgrading procedures and process. We have one Catalyat 3850 switch with High CPU utilization. Our management systems is only reading the output on "sh process cpu platform" which is very different from "sh process cpu". 29 44. When booting from usbflash0: the bootup completes and seems to work. Stack Manager and High Availability Commands;. To perform a manual switchover and to use the high availability feature enabled in the switch, execute the redundancy force-switchover command. The output (Cisco IOSd® CPU output) shows that ARP Snoop, IP Host Track Process, and ARP Input are high. I have researched and cannot figure out what this process is for. 2 process that seems to be the culprit. Core 1: CPU utilization for five seconds: 34%; one minute: 14%; five minutes: 13%. Core 1: CPU utilization for five seconds: 18%; one minute: 24%; five minutes: 28%We have one Catalyat 3850 switch with High CPU utilization. Here is the part of the "show process cpu sorted". Stack Manager and High Availability. Eg. Page of 54 Go 39. Checked from the monitoring software, the CPU usage is high. 49% 77. CPU usage can be monitored on a per. The CPU usage is primarly used by the following processes. 3 to see if it helps but any suggestions would be helpful. 0 Core 0: CPU utilization for five seconds: 45%; one minute: 44%; five minutes: 44%. EN US. Eg. Check that the CPU utilization is not too high. Command Reference, Cisco IOS XE Gibraltar 16. Fed punjectRx The above two processes are consuming the major portion of the cpu. WS-C3850-12XS-S. * 2 52 WS-C3750G-48PS 12. 0 CORE-SW01#show proc cpu detailed process fed | ex 0. We have two 24 port 3850 switches stacked. " Reference: Catalyst 3850: Troubleshooting Output drops. Contacts; Feedback; Help; Site Map; Terms & Conditions; Privacy Statement; Cookie Policy; TrademarksHow to configure AVB. 12. 5. 排除CPU使用率过高故障. Either one of the options will not be good because Cisco has been been unable to fix a plethora of memory and CPU issues affecting IOS-XE. Description. Identify the Process that Consumes CPU Cycles Step 2. We pulled the same config from the 2960X and now the 3850 is hitting 90%+ CPU. Thanks PL. The reboot in all cases took 12 mins for a 2 switch stack to 13 1/2 mins for a 9 switch stack. 0 show proc cpu sorted | ex. 5sec 1min 5min Process. Check the details of the LACP neighbor, such as the operational mode, neighbor system Dev ID , and its priority. For example, on a 3650 I have traffic punted to the CPU from FED for SW forwarding queue and notice a lot of dropped packets. 2. • IOSd runs as process on kernel-> linux_iosd-image • Not all processes run on all switches. 26. The show processes cpu history command displays in ASCII graphical form the total CPU usage on the router over a period of time: one minute, one hour, and 72 hours, displayed in increments of one second, one minute, and one hour, respectively. System restarted at 11:41:09 KST Mon Feb 15 2016. Symptom: Hulc LED Process uses 15-30% CPU on Catalyst 3560X/3750X platforms. The new boot loader can support booting both Cisco IOS XE 3. 39 MB) View with Adobe Reader on a variety of devices. 9 show processes cpu platform sorted CPU utilization for five seconds: 64%, one minute: 62%, five minutes: 63%. 663: %PMAN-3-PROCHOLDDOWN: F0/0: pman: The process fed has been helddown (rc 139) Chassis 1 reloading, reason - Reload command. I analysis "show proc cpu" result, the root cause of high CPU utilization is "FED" process. 1. The show process cpu command naturally displays how the CPU currently looks. 8 fed 本帖最后由 xupeng 于 2015-4-10 09:12 编辑 案例分享:ARP导致3850交换机CPU中断高 第一步: 找到CPU占用率高的进程 3850系列交换机使用4核CPU, 使用show process cpu 命令将会看到: 3850-2#show processes cpu sort | exclude 0. 0 Helpful. 26 0 stack-mgr 13631 3774917 28728769 167 2. Schritt 2: Bestimmen der CPU-Warteschlange, die die hohe CPU-Auslastung verursacht. 12. It is run as a software process within the kernel. See the attached process output. fed —The Forwarding Engine Driver process. Model Number : WS-C3850-48P. 3. I found the following documention mention how. . Please provide the output to the command "sh processor memory platform sorted location switch 2. We have now found out that switch one of the two, is running constantly on 99% usage for core 4. The nagios reports the following message: "cisco_load | CPU: 99 99 99 : 99 > 98". 33 26. 5. 5b without a noticeable change in CPU levels. Is that's not possible, then traffic is punted to the Control Plane/CPU so it can be processed . Problem analysis process. VACL input and output ACEs are stored in a single region (TAQ). Hulc LED Process is a process responsible for link status detection. 1a 23/Nov/2017. I upgraded the firmware from 16. 3850-48-01#show processes memory platform sorted. An example is a cisco 4500X switch with a sample of the configs shown below. If there is SFP port in use, it might be a little bit high. . FN - 64191 - Catalyst 3850/3650 Switches That Run Cisco IOS XE Releases 3. 1 etc then you won’t see any OID for each core , this means at present Cisco has not included or implemented the OIDs for each core under CISCO-PROCESS-MIB. show platform health. In some network deployments, a busy CPU is normal. Runtime(us) CPU time that the process has used (in microseconds). We have two 24 port 3850 switches stacked. 283 I 574800 3225649 0 4. Diagnose a Potential Stack Cable or Port Issue. 241. RSS フィードを購読する. 1 to 3. 9. Issue is happening only on working hours, so likely that connected to user activity. Swap: 5618316k total, 5461020k used, 157296k free,. Switch # redundancy force-switchover System configuration has been modified. It is installed on VMware with the minimum requirements. Step 2 Use the show process cpu command to display CPU and core processor usage. 7, rebooting itself several times and sending this logs: %IOSXE-4-PLATFORM: Switch 1 R0/0: kernel: EDAC MC0: 1 CE DIMM 0 rank 0 bank 7 row 56455 col 7348 on any memory ( page:0x0 offset:0x0 grain:0 syndrome:0x0) A. 0 Core 0: CPU utilization for five. Full screen Standard. 83 1088 fed 5637 968593 64678942 1101 24. 03. Troubleshoot High CPU Usage in Catalyst Switch Platforms Running Cisco IOS-XE 16. 93 26. 6. 2(53)SE. Traffic across the switch is stable at this time but we are concerned about this issue. 1. Core 0: CPU utilization for five seconds: 45%; one minute: 44%; five minutes: 44%. The CISCO-ENHANCED-IMAGE-MIB provides information about events running on the system and has been extended to be useful for modular operating systems. we had an alert through for a sustained period of high cpu usage, upon investigation we observed the following. 75% PdsEvent = 15. I have certain IPs that can acces all networks locally but cannot access anything on remote networks. Microseconds of CPU time for each. 54 has issue while . 0. 9300-Switch#show platform hardware fed switch active qos. EN US. 0 Core 0: CPU utilization for five seconds: 22%; one minute: 21%; five minutes: 23% Core 1: CPU utilization for five seconds: 9%; one minute: 11%; five minutes: 16% Core 2: CPU utilization for five. 02. #show process cpu detail process fed sorted Core 0: CPU utilization for five seconds: 67%; one minute: 61%; five minutes: 63% Core 1: CPU utilization for five. 3 that is constantly showing high memory utilization. C3850# show processes cpu detailed process fed sorted | ex 0. Cisco Catalyst 3850 Series Switches Support Cases:363 Known Affected Releases: (1) 15. 39 5. 91% 84. Task . . 06. Catalyst 3850 Series Switch High CPU Usage Troubleshoot Document ID: 117594 Contributed by Aninda Chatterjee and Yogesh Ramdoss, Cisco TAC Engineers. 89 0 iosd-FED process crash -flash write issue -Traffic destined to the CPU is dropped following a reload and a shut/no shut of SVI fixes it until the next reload. I would recommend to use other DHCP server and exempt your 3850 device from this process. 00 . This is just to rule out any. These regions/banks are called ACL TCAMs (TAQs). A vulnerability in the IP Version 4 (IPv4) processing code of Cisco IOS XE Software running on Cisco Catalyst 3850 and Cisco Catalyst 3650 Series Switches could allow an unauthenticated, remote attacker to cause high CPU utilization, traceback messages, or a reload of an affected device that leads to a denial of service (DoS). Also, I was reading this about NX-OS : The Cisco NX-OS operating system takes advantage of preemptive CPU multitasking, so processes can take advantage of an idle CPU in order. According to the switch logs, after searching for related processes, we can find that the occupancy rate of FED and stack-mgr. txt" action 0. Task . Although the RSPAN VLAN does not learn any MAC addresses, a copy of the packet with unknown source MAC is still sent to and dropped at the CPU. 97 26. Thanks. I have found others discussion with high CPU process but there is no clear explanation for PunjectRx. Troubleshoot 3650/3850 Stack Manager Reloads 28/Feb/2023;. 4. 6, haven't seen any related bugs for this version. IStep 2: Determine the CPU Queue that Causes the High CPU Usage Condition. " Reference: Catalyst 3850: Troubleshooting Output drops. Chinese; EN US; French; Japanese; Korean; Portuguese; SpanishBeginner. 07 26. 16. 0 cli show processes cpu sort >> bootflash:high-cpu. Cisco Catalyst 3850. CSCuq48800. Cisco 3850 High CPU due to fed Go to solution. Look at the “logfile: Cisco IOS” report prior to a reset is typically a good place to start. 4 software release is posted on CCO for General Availability (GA). Happy to hear it's been identified. x (Catalyst 3850 Switches) Chapter Title. This release note gives an overview of the features for the Cisco IOS XE Denali 16. Es importante monitorear estas colas para descubrir qué paquetes se envían a la CPU y cuáles son procesados por Cisco IOSd®. 04. Has anyone seen this and solved it without an upgrade. fed process is around 50% and pdsd process around 23%. 05 will be stable ? or 16. vManage shows real-time CPU utilization for a device. 04SE. 0 Core 0: CPU utilization for five. Switch # redundancy force-switchover System configuration has been modified. 3 cli command "show process cpu sorted | append nvram:. 27777 26990 0% 0% 0% S 314179584 fman_rp. so that you can only see the processes that actually use CPU cycles. 6 we are facing the high CPU usage. 11 0 DAI Packet Process 3850-2#show processes cpu detailed process fed sorted | ex 0. x (Catalyst 3850 Switches) Configuring Optional Spanning-Tree Features Monitoring the Spanning-Tree Status. I would. x (Catalyst 3850 Switches) Chapter Title. Cisco 3750 High CPU Load; Options. 01. 4800: Pool: Processor Free: 1598872 Cause: Memory fragmentation. The Cisco Catalyst 3850 Series Switch has a number of queues that cater to di erent types of. m. 00 CPU utilization for. 1. Cisco Moderador. Just swapped a failing 2960X with a 3850 and have high CPU (fed main event and linux_iosd-image . X train, like 16. Traffic that exceeds the default 600 packet per second rate in the CoPP policy is dropped before it reaches the CPU. These switches seem to be working fine with no CPU issues so far but as I said before they all have bugs. Options. ) run high on CPU and there is really not much you can do about it except upgrading to a different version, and that sometimes help but not always. Average CPU is not really high, between 40% and 50%. PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 5715 4011600 27402184 4878 25. no issue getting IP address. Conditions:. I have been trying to figure out 3850 / 3650 CPU queue traffic with not much success. 12-29-2009 02:32 PM - edited 03-06-2019 09:06 AM. 01 49. We tried disabling ip dhcp snooping on user VLANs and adding deny all rule for ipv6 but nothing helps. As stated earlier, I plan to upgrade the software to 3. txt" action 0. NCM is reporting lower CPU for our 3850 & 3650 switches. We use the switch to supply DHCP for the VLANs. E. If you see high CPU utilization during the IPX Input process, verify the following: IPX fast-switching is disabled. There is preloading and installation that can be done during production time. A vulnerability in the IP Version 4 (IPv4) processing code of Cisco IOS XE Software running on Cisco Catalyst 3850 and Cisco Catalyst 3650 Series Switches could allow an unauthenticated, remote attacker to cause high CPU utilization, traceback messages, or a reload of an affected device that leads to a denial of service (DoS). Suggesting to upgrade to 03. show platform software fed switch active cpu-interface queue retrieved dropped invalid hol-block-----High rate app 994752082 994752082 0 0. From what I can see, the 'iosd' and 'fed' processes are high, which usually means high interrupts. To avoid high CPU usage, do the following:. 10. This will be the second beta rebuild on 16. 一旦您发现 CPU 使用率高的症状中列出的任何症状，请执行以下操作：. 42 1088 fed 6258 3292482 92102444 4593 23. 12. 73 26. I have been investigating some high CPU usage on our 3850s. 2. 1. Microseconds of CPU time for each. Note: It is necessary to define 'exit-val. If the command syntax check in the running configuration of the active switch fails while the standby switch is booting, use the redundancy config-sync mismatched-commands command to display the Mismatched Command List (MCL) on the active switch and to reboot the standby switch. show platform software fed switch active punt cpuq al. IPv6SnoopingCommand (StartingfromCiscoIOSXEDenali16. EEM-Beispielskript (Embedded Event Manager) für Cisco Catalyst Switches der Serie 3850. Passaggio 3: Scaricare il pacchetto inviato alla CPU. 35 49. x or Later Releases Related Information IntroductionStep 1: Identify the Process that Consumes CPU Cycles Step 2: Determine the CPU Queue that Causes the High CPU Usage Condition Step 3: Dump the Packet Sent to the CPU Step 4: Use FED Tracing Sample Embedded Event Manager (EEM) Script for the Cisco Catalyst 3850 Series Switch Cisco IOS-XE 16. 检查是否存在可能的安全问题。. Runtime(us) CPU time that the process has used (in microseconds). 0 Core 0: CPU utilization for five seconds: 45%; one minute: 44%; five minutes: 44% Core 1: CPU utilization for five seconds: 38%; one minute: 44%; five minutes: 45%Étape 1 : Identifiez le processus qui consomme des cycles CPU. 3. 309 UTC: %ACL_ERRMSG-4-UNLOADED: 1 fed: Input IPv4 L3 ACL on interface Vl108 for label. I have 3 of the 9 standalone switches still reporting high cpu and I am receiving alerts from Cisco Prime. CPU utilization for five seconds: 98% /3%; one minute: 96%; five minutes: 98%. 6. 07 26. switch#sh proc cpu detailed process fed sorted | ex 0. In diesem Dokument wird beschrieben, wie Sie bei Problemen mit hoher CPU-Auslastung, vor allem aufgrund von Unterbrechungen, auf den neuen Cisco IOS®-XE-Plattformen, auf denen 16. The Cisco® 40GBASE QSFP (Quad Small Form-Factor Pluggable) portfolio offers customers a wide variety of high-density and low-power 40 Gigabit Ethernet connectivity options for data center, high-performance computing 00networks, enterprise core and distribution layers, and service provider applications. According to the switch logs, after searching for related. 04E that is reporting high CPU caused by " EPC WS Pkt Send p" I have been trying to figure out what could be causing the Embedded Packet Capture to cause high CPU but am not having any luck. 6. 发出 show processes cpu 命令可显示有关这些进程的详细 CPU 使用率统计信息，发出 show processes memory 命令可显示使用的内存量。. So, most likely a hardware issue. Please find the below output and suggest me the solution; continouesly we are monitoring and still it is same. Core 0: CPU utilization for five seconds: 1%; one minute: 4%; five minutes: 23%. 83 1088 fed 5637 968593 64678942 1101 24. Sw Ver. 9. C3650#show processes cpu detailed process fed sorted | ex 0. Command Reference, Cisco IOS XE Gibraltar 16. If you have a 3850 stack then use the following command where the number signifies the stack member where the uplink resides: Prompt-3850#show platform acl counters hardware switch 1 | inc SGACL. One is VMATM Callback and one is IP Input. Cisco IOS-XE 16 — 概览; 排除 Catalyst 3850 系列交换机高 CPU 使用率问题; Cisco IOS®和IOS®-XE的嵌入式 数 据包捕获配置示例; 在运行IOS-XE 16. 1. fed and stack-mgr causing High CPU on 3850 CSCuo14511 Description Symptom: "show process cpu" reports high CPU utilization due to 'stack-mgr' process (which consumes >75%). after a while it recovery to normal. NPM has been reporting high memory utilization, which is attributed to the lsmpi_io reading. Cisco 버그 ID CSCup49704 - 3850 FED 충돌. It is controlling two ASAs with not much traffic passing through them. 00 Core 0: CPU utilization for five seconds: 80%; one minute: 79%; five minutes: 79% Core 1: CPU utilization for five. 手順2：高いCPU使用率を引き起こすCPUキューを判別する. 0 Core 0: CPU utilization for five seconds: 34%; one minute: 35%; five minutes: 41% Core 1: CPU utilization for five seconds: 79%; one minute: 81%; five minutes: 62% Core 2: CPU. lsmpi_io Pool Total: 6295128 Used: 6294296 Free: 832. 11 0 IP Host Track Proce #show processes cpu detailed process fed sort | ex 0. x (Catalyst 3850 Switches) Chapter Title. NCM is reporting lower CPU for our 3850 & 3650 switches. 10-08-2013 09:30 AM - edited 03-07-2019 03:54 PM. The default queue structure is unified across all Cisco Catalyst 9000 family switches for all ports, regardless of speed, and is based on a two-queue model. Please help to resolve the issue. 一旦您发现 CPU 使用率高的症状中列出的任何症状，请执行以下操作：. n164-3850-DHS-SP-1stFL-1#show process cpu detailed process iosd sort | exclude 0. 要验证设备的CPU或内存使用率级别是否指示可能存在问题，请使用输出解释程序工具。. 1. xxxx being punted to CPU. I noticed that sh run, wr and some other sh commands are taking forever to execute. 03 cli command "no monitor capture tac_cpu" 관련 정보. - If the switch supports POE, it checks to see if there is a Power Device (PD) detected. 5. 0 cli command "show platform punt statistics port-asic 0 cpuq -1 direction rx | append flash:HG-CPUlog. The CPU on the Cisco StackWise Virtual active switch. Is it the version 16. I was looking at a show proc CPU history on a 3850 (IOS-XE) switch and I see short CPU spikes. xxxx. 06E (Version 03. If only one power supply is installed, it should always be in power supply bay 1. 0 Core 0: CPU utilization for five seconds: 16%; one minute: 17%; five minutes: 17% Core 1: CPU utilization for five seconds: 96%; one minute: 97%; five minutes: 97% Core 2: CPU utilization for five seconds: 100%; one minute: 99%; five minutes: 74% As you'll notice, the high cpu value on the core doesn't always show up on the same core. The "Hulc LED" process does following tasks: - Check Link status on every port. WS-C3850-24XS-S. Switch_1# sh processes cpu platform sorted location switch 3 R0 | in fman Hello, After the IOS upgrade to the version 16. Cisco IOS uses multiple techniques for L3 routing a packet in software: (1) process switching (2) fast switching and (3) CEF switching. Schritt 3: Verwerfen Sie das an die CPU gesendete Paket. 12. packets (the FED maintains 32 RX CPU queues, which are queues that go directly to the CPU). Since two weeks the core switch has an utilization of 100% (every ten minutes). for one particular 3850 stack, it shows 70%, whereas the switch CLI shows; #sh process cpu. Hi, I have 3650switch running 3. 通常，CPU 使用率较高是由安全问题（例如网络中运行的蠕虫或病毒）引起的。. 03. E. X or 3. 2) Enable memory allocation tracking to look for signs of a "callsite" (function) leaking memory as follows:Options. 42 1088 fed 6258 3292482 92102444 4593 23. txt action 4. Few of our branch office switches are running with high memory utilization, we are receiving alerts on our monitoring tool for the same. Schritt 4: Verwenden der FED-Ablaufverfolgung. When the CPU is over 80% busy, the script takes these actions: creates a timestamp from the output of show clock, and uses this to create a unique filename; outputs about process and software state are then written. This command would also list the processes as shown below but it would not add up to 100%. 6. Release Notes for Cisco Catalyst 3850 Series Switches, Cisco IOS XE Denali 16. switch# show lacp sys-id. This command initiates a graceful switchover from the active to the standby switch. xreleases). Intermittent High CPU Related Information Introduction ケーススタディ：アドレス解決プロトコル (ARP)割り込み. 36% OOBnd RX = 16. show process cpu の出力に関しては、出力されているProcessだけがCPUを使用しているわけではない為に差分が発生するということで、理解いたしました。 以上、よろしくお願いいたします。I'm working on Cisco-Network(with Coreswitch Cisco 3750E). 66 2. 241. 32% 0. Cisco bug ID CSCup49704 - 3850 FED Crash. Schritt 3: Verwerfen Sie das an die CPU gesendete Paket. here is the output: DC1#show process cpu | ex 0. Esempio di script EEM (Embedded Event Manager) per gli switch Cisco Catalyst serie 3850. The memory utilization for switch 2 is abnormally high (ideally <50%). 3. - Check the status of the transceiver. Cisco IOS-XE 16 - 요약; Catalyst 3850 시리즈 스위치 높은 CPU 사용량 문제 해결; Cisco IOS ® 및 IOS ®-XE를 위한 임베디드 패킷 캡처 컨피그레이션 예; IOS-XE 16. Everything else is not even at 1%. Core 2: CPU utilization for five seconds: 57%; one minute: 65%; five minutes: 67% Core 3: CPU utilization for five seconds: 53%; one minute: 61%; five minutes: 62% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 5714 985059 97694899 424 45. Notice that you must enable debug pds pktbuf-last before you use the command. Catalyst 3750XのCPU使用率が高いという問題があり、シスコ社の文書を参考にしてトラブルシューティングを行いました。. BRM_HQ_CSW_01#sh proc cpu sort. 69 34817 iosd There are several bugs involving high CPUs and "stack-mgr" and "iosd" processes and CSCuo14511 is one of them. Says the following: When you downgrade to a Cisco IOS XE 3. Importers, exporters, distributors and users are responsible forCisco Catalyst 2960-X Series Switches, Cisco Catalyst 2900XL Software. x 27/Jan/2021; Troubleshoot PoE Imax Errors on Catalyst 3650/3850 Switches. 3. 28 MB) View with Adobe Reader on a variety of devicesOptions. 59 600 25 24000 4. x 07/Jul/2016. 0 cli show processes cpu sort >> bootflash:high-cpu. You can use following procedures to find out if your Catalyst switch seeing high CPU utilization is affected by this problem, and implement respective solutions. Stack Manager and High Availability Commands. Cisco IOSd®가 CPU 사용량의 대부분을 담당하므로 이에 대해 자세히 알아보겠습니다. I performed the platform packet capture and it's indeed a lot of ARP Requests being spammed. 02. 4, then you're probably hitting this bug CSCuz57493 - High CPU observed in punjectrx fed-ots-main thread. txt"We had the same issue on many stacks and ended up upgrading the IOS to at least Version 03. 6. Hello, I have a Cisco 3850 stack with 2 switches, 3. Hello Is it better to buy Catalyst 9300 with 8 10G port network module or Cat 3850 12 port fiber switch ( stack) We are looking for upstream switch with L3 and SDA capabilities. 8. Resolution resolved our issue. 07-08-2015 12:38 PM - edited 03-08-2019 12:53 AM. Problem analysis process. EN US. Solved: Hi All, We experience high CPU usage on Stack 3850 switches and currently running WS-C3850-48P 03. 02 1088 fedI have a stack of 4 Catalyst 3850-24X working as a distribution switch, lying in between a Nexus 7K core switch and 34 C3850 access switches/stacks.