Switching

お世話になります。現在、Catalyst9200-24T-A(NetworkAdvantage)を使用しています。本L3スイッチにてマルチキャストで受信したパケットをユニキャストに変換して送出する利用を検討しています。IOS XEシリーズ等で使用するバーチャルインタフェース(Vif)を用いたmulticast service-reflectionは使用可能でしょうか？もしくはmulticast　helper-mapといったマルチキャストをユニキャストに変換できるコマンドはありますでしょうか？以上...

Hi,I have an N9K that we use a loopback interface on for monitoring tools. A number of these tools use SNMP to poll this loopback IP address. At times, the SNMP GET RESPONSE will take more than 5 minutes to show up (typical average is around 2 second...

Dear allSome users complains that they disconnected from Lan for some seconds and return again. How to check the switch 2960 error logs to confirm that the switch is failure or working properly 

How are the ports numbered in a 48 port  switch? I know they are separated into 4 groups of 12. Looking at the front of the switch… Is it 1 2 3 4 5 67 8 9 10 11 12 Or1 3 5 7 9 112 4 6 8 10 12 Thanks

Hi, We have an ongoing issue with the SG350 range of switches when using them to allocate DHCP addresses.  The issue is that sometimes they will not fully issue an IP Address to the Laptops that are connecting into the Switch via Ethernet.  When we l...

Hi,We have a customer who needs to limit the number of devices that are allowed to connect to a port.This is an SDA environment (not really relevant for this question) and DNA-C pushes the following config (amongst many other things):-device-tracking...

Hardwarecisco Nexus 3172 ChassisIntel(R) Pentium(R) CPU @ 2.00GHz with 4031216 kB of memory.Processor Board ID FOC213706C4Device name: AZ_N3K1_SW1bootflash: 1603440 kBusb1: 0 kB (expansion flash)Kernel uptime is 0 day(s), 8 hour(s), 25 minute(s), 49 ...

When I do 'show interface vlan19" (example) it shows no L3 counters.This obviously worked on our 6500's but not on the Nexus. How do I enable it?I don't want to use Netflow, we pull the traffic stats with SNMP. "Show vlan counters" only shows L2 coun...

Hello Guys, I am back here with a question. I am busy in my office work as well Cisco magic number study so time management is an issue for me.  Hoverwere I am facing a strange issue with Network as OSPF neighborship with SD-WAN devices flapping, onc...

Hi all,I was LAB testing a 2960X for routing in small sites.During the test I configured multiple SVIs and the maximum (16) static routes.While I was doing this I recieved follwing log message:%PLATFORM_UCAST-4-PREFIX:  One or more, more specific pre...

Hi, I have a SF30-48P and I am trying to set it up to extend the network (just internet initially) and I am having problems with the basic setup. I have a modem / router and have connected it to the switch via the link port G1 but I cannot get the sw...

Hello to everyone!Some time ago we replaced our stack of 3850 with two 9300. It had been working fine for a while but recently we noticed huge broadcast drops (especially DHCP) with low-to-moderate utilization. Both client and DHCP server are directl...