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Is Cisco 2960 a Layer 3 Switch?

Question: Yesterday a friend of mine was having some issues in his office network & tried my hand at resolving them. While I was SSHed to his 2960, I was surprised to see 2 SVIs as 'up' & 'up'. In fact, I created another SVI & that came up as well. I...

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Cisco -- switchport host

Use the switchport host interface configuration command on the switch stack or on a standalone switch to optimize a Layer 2 port for a host connection. This command does 3 things! Configures the switchport for access mode Enables portfast Disables Etherchannel...

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Cisco Eigrp Timers

Today at work I have run into troubleshooting an EIGRP problem with one of our customers; while troubleshooting this problem I started making every optimization I know about EIGRP. In this post I am sharing with you EIGRP timers I adjusted in order to...

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Cisco native vlan

When a frame is forwarded on a port, it is sent either "Tagged" or "Untagged". I can see you clearly understand this by the wording of your question. For some vendors, that's the end of the story. For a given port, you have "Tagged" or "Untagged" VLANs,...

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Tagged and Untagged in vlan

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 3750 switches with several VLANs, and dot1q trunks setup between the switch stacks. I've...

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The question of Cisco route-map

Question: got this example from Sir Wendell's CCNP book. ip prefix-list manufacturing seq 5 permit 10.17.35.0/24 ge 25 le 25 route-map filter-man-slash30 deny 8 match ip address prefix-list manufacturing ??-means match the first 3 octets 10.17.35 to be...

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Ospf passive-interface

Question: I read in ospf about passive-interface. When we add a subnet by network command and add passive-interface to it,It stops all the OSPF processes for that interface ,but OSPF is UP. Is it used to advertise subnet on the passive-interface to the...

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EIGRP load/reliability metric components

"EIGRP routing updates are triggered only by a change in network topology (interface up/down event, IP addressing change or configured bandwidth/delay change) and not by change in interface load or reliability. The load/reliability numbers are thus a...

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Port-channel configuration

Question: I have a question about the configuration of etherchannels. I have seen many configurations to set etherchannels in texts books, examples, etc. In all of them, they set the switchport mode (access, trunk or dynamic auto/desirable) under the...

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