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10 posts with cisco switch

Portfast to non managable switch

Question: Recently i have found that in one of the Cisco WS-C2960S-48FPS-L switches in our environment, portfast enabled to a interface whichis connected to a non-managable switch. But 3 servers are conencted to that non-managable switch. Since this switch...

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Cisco Switch Password Recovery

This tutorial documents the procedure for performing a password recovery on a Cisco WS-C2960S-24TD-L switch (and probably other models, as well). 1. Unplug the power cable. 2. Hold down the mode button while replugging the power cable. 3. Type flash_init...

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How VLAN Tagging, Untagging Works

Question: This seems like a simple concept but I'm having a hard time grasping which traffic is tagged vs that which is not tagged. We have a network of primarily WS-C3750X-24T-S switches with several VLANs, and dot1q trunks setup between the switch stacks....

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How to configuring default gateway on switch

Question: I took some very good advice & signed up for the Cisco Learning Lab. The wording on the intial switch setup instructions & the default gateway is a little confusing. For a switch the ip default-gateway command should be run in the global config...

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Difference between arp and inverse arp

Question: So basically both arp and inverse-arp are L2 to L3 mappings; simple arp: MAC(L2) -----> IP(L3) inarp: DLCI(L2) -------> IP(L3). But by the word "inverse" I read _opposite of_ , thus implying inarp is the opposite of arp. Can someone elaborate...

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Native VLAN explanation

Question: Can someone explain to me what a native vlan is? How it compares to other types, i.e. management, default, etc. I am having a hard time with the terms. Answer: I am looking at a network with different native vlans across multiple switches. While...

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Help to understand L3 SW

Question: I hope you can help me as usuall , i designed a layer 3 lab contains 4 L3 WS-C3560X-48T-S switches + Vlans , the issue is as the following : i can ping any pc from sw0 to sw1 but i can't which is weird ping any thing else like from sw0 to sw2...

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