Switching

Hi, We encounter some issues for setting up a NTP high availability architecture. We have 2 GPS appliance which provide stratum 2 NTP services and a 3750x which redistribute NTP to all Vlans (approx. 100). The issue is when the 3750x reboot it broa...

Are the infinity black cables shipped with the 3750X-12 still under support and are there any issues using such cable to interconnect the 2 3750X-12

Hello,  I have the following problem: I need to mark packets (to downgrade ip dscp priority) coming from VLAN 250 and going to VLAN13. Access-list has been defined to match needed packets and class-map and policy-map have bee conigured and applied to...

hi, i have 15-20 switches at access layer and 2 numbers of core switches at core layer. for redundancy i want to setup a ring topology. My physical connectivity is as follow : 1st core switch -- access layer switch-1 -- access layer switch 2 -- ac...

I am trying to create a simple manual EEM script so when you login to a switch and run "event manager run tshoot" it will run the follow EEM script and show the interfaces in an error disabled script.  The switch takes the configuration, but when I r...

Dear all, We have cisco 4507 at the distribution layer, where several VLANs are there. For past few days we are observing that users of one vlan VLAN 52 are unable to connect to the network. On investigation, we found out that the users of this VLAN...

All,What do the buffers RxQFB, RxQ0, RxQ1, RxQ15 etc.. mean in the "sh buffers" output ?Interface buffer pools:RxQFB buffers, 2040 bytes (total 904, permanent 904):     895 in free list (0 min, 904 max allowed)     18497860 hits, 0 missesRxQ0 buffers...

Hi, I have a 3850 in production using software 0.3.02.03.SE, the SW image is cat3k_caa-universalk9, I have a requirement to use private vlans but it appears this switch does not support it!  references: http://www.cisco.com/c/en/us/td/docs/switches/...

Hi Cisco Support Community, I encountered a weird scenario where ip routing is disabled in 3850 switch but routing table and ip cef exists.servers A ------------ router A <---------------------->  3850 <-----------------------------> router B -----...

Hi Team,  cisco Nexus 3064 Chassis ("48x10GE + 4x40G Supervisor")  ios  n3000-uk9.6.0.2.U5.2.bin.  Finding below given logs, please analyse and update:  [7m--More--[27m 2016 Sep 1 14:50:03.033 MCXSXCASH_SF_DR_A 1 14:50:02 %KERN-3-SYSTEM_MSG: [78680...

Hi everyone, I am attempting to configure multicast routing on my 871W Router, but for some reason the "pim" subcommand does not exist. I am running IOS 12.4.   What are people's thoughts as to why it is missing?   All of the documentation I have rea...

I have a new c3850-24P-S and a new 5506 firewall. I have created three VLANs on the switch, each with its own /24 IP network: vlan 123: 172.16.10.0/24 vlan 234: 172.16.20.0/24 vlan 345: 172.16.30.0/24 Port 24 is a trunk connected to the 5506's Inside...

How would I connect 2 physical routers (2811 & 2911) via their serial interface? I have 2 ooooooooold paradyne CSU/DSUs, but when showing "show controllers s0/0/0" both are listed as DTE and therefore neither router will take the "clock rate <clock r...