Switching

Terminology Used:  Switch - a physical unit;Stack - a logical unit made up of multiple switches NOTE: This bug only affects Catalyst 9300 in a stack (>14 weeks uptime).This bug DOES NOT affect stand-alone Catalyst 9300 switch.This bug DOES NOT affect...

Hi All,I am seeing a lot of OSPF "Dead timer expired" and OSPF adjacency drop off for for R1 (see below).Physical topology.R1 (Cisco 7206) --> R2 (Cisco 7606)R1 = 203.17.101.xR2 = DR = 203.17.101.AIs there a way to narrow down what is causing this? M...

 Hello,We intend to use MACL to filter inbound traffic on SVI interfaces,my question is where would the mac-addresses for the MACL be stored? i hope not in the configuration because we have a large pool of mac addresses to use. Scenario: We use a GPO...

With Port security enabled, interface comes up, but cannot see a MAC on the interface, IP phones or systems don't get an IP address. May 29 07:18:57: %PARSER-5-CFGLOG_LOGGEDCMD: User:admin logged command:logging buffered 20480May 29 07:21:56: %PARSER...

Hi everyone, I've been scratching my head with this issue, thus reaching out for help.  I have a 3560G running 2.2(58)SE2 and I want to configure dot1x.  Here is the config:  aaa new-modelaaa group server radius myradiusaaa group server tacacs+ mytac...

I have a Windows Server 2016 DHCP setup on my first switch.  The DHCP server has LAG setup on 2 ports with LACP enabled.  The devices(pcs,laptops,printers) on the first switch all are able to get DHCP addresses from the server and are pingable.  My 2...

Hi All, Is there any need to run BFD when using dark fibre between two L3 switches? I have customer that wants to set this up but I would have the thought that the inherent capabilities of the switch to quickly detect a link failure, notify the IGP (...

Hi   I'm creating a network design, I need to confirm wich SFP i can use to interconnect  a SG350-28SFP with MGBLH1 transceivers to a switch Catalyst 3850-XS.    The objective to fulfill is that the fiber link betwen both switches supports up to 40km...

So in packet tracer, I have a PC 192.168.1.6 on a network 192.168.1.0 and I'm trying to allow my PC all access to network 192.168.2.0I did the commandaccess-list 100 permit ip host 192.168.1.6 192.168.2.0 0.0.0.255int g0/1ip access-group 100 in(int g...

Can the bootflash memory on a 3172PQ be increased? Our company has the model that has 2 gig bootflash. We are patching from 7.0 to 9.3 and t here is not enough space to store the 9.3 IOS for the upgrade.  I am familiar with# copy scp :source image na...

Hello,after some time of inactivity today I turned on my cisco 3750 24-TS and it has some problems.do you think it is an hardware problem ?any hints ?log follows POST: PortASIC RingLoopback Tests : BeginPOST: PortASIC RingLoopback Tests : End, Status...

As you all know, the ports in the 3550s comes with DTP enabled. I have gone through the messages posted in this group in last Nov. 23rd. The recommended solution to configure the port to "switchport nonegotiate" didn't work. I do get the message "Com...

Dear Sir, Kindly send me How to change the password for my Cisco Devices:Enable Secret & Telnet.Thank You.