I'm studying PIM Sparse mode at the moment. I understand the principle that, upon receiving traffic from a multicast source, the Group Members DR will build an SPT direct to the source (rather than going through the RP). However it is also stating t...
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Forum Posts
Hi All, seeking for advice. Below is our network scenario details, All access layer switches are connected to distribution layer switch. The distribution switch is acting a default gateway of all network devices including servers. Further we have one...
Hi Team, we have a L2 switch,L3 switch and a router. And the communication will be like as follows, HOST -> L2 SW -> L3 SW -> Router. The switches and routers are already configured and working fine. Now i try to add a new VLAN segment in the networ...
Hello, I have a pair of n5k, with 10* n2k dual homed. I have a Po for a server connected on 2 different n2k, but when I try to add vPC ID the Nexus reject my command. NEX-A# sh port-ch sum201 Po201(SD) Eth LACP Eth1/23(D) Eth1/24(D)30...
I have cisco 3560 and 3750 switches in our network. i would like to allow only approved mac address to connect to network i have gather all mac addresses from servers, printers and work stations. now i want to create a list like acl and allow only t...
I have simple stack of a 3750X-24T-S and 3750X-24S-S running c3750e-ipbasek9-mz.122-58.SE2.bin. IPBase Licenses are Permanent and Active on both switches.They will not stack as they are running different stack versions. The "sh platform stack manager...
I need to replace a WS-C3750-24P switch (currently the master switch) in a stack of 4 switches with a 48 port model (WS-C3750-48P). I plan to shut down the master switch 1, remove the StackWise cables, cable up the replacement 48P 3750, and power it ...
Greetings, I am having some issues with set a move--on a network that I didn't design but was rushed to implement. I have a user with a desktop switch,(2960), which is connected to a 2960 access switch, which is connected to the core switch, (3850)...
Resolved! Disable MAC flapping messages
Hi, I am receiving a lot of notifications from Wireless APs related to MAC addresses flapping bewteen ports (SW_MATM-4-MACFLAP_NOTIF). Those messages are so annoying as they are filling the syslog server quickly. I can't find a way to disable those m...
Hi, There is frequent high utilization noticed on Cisco 2900 router which is in our network. Currently I am able to login to the router without any issues but the utilization is getting nearer to 80% sometimes. What are the possible reasons which ...
I've been assigned to clean up our internal corporate LAN/WAN (separate from our production network). My first step is to duplicate our network in GNS3 so I can test the changes I want to make before doing them on the live network but I'm running int...
Hello everyone , I have a question that : I read document say that if Portfast conected to switch lead to loop ? I don't know why so I hope will get more explain from all you . Thank You !
Dears, we are about to modify our current network to support 10 G , our current core doesn't fit we are comparing between the folowing options 1.buying a new Cisco 4500X Core 2.buying a Cisco nexus 5000 series 3.upgrading the current core sub 6LE ...
Hi Guys, I'm trying to get Dot1x working on some new 2960X switches running 15.2(2)E3. When I run the "dot1x test eapol-capable" I'm not getting any results in the logging or on the console. I haven't even got to the point of configuring the switch ...
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