I have a couple of N9K-C93108TC-EX switches seeing about half of the packets coming from a server being errors. I can't find any detailed counters showing what the error is. Where should I be looking? Thanks. switch# sh int e 1/8Ethernet1/8 is upad...
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Resolved! Multicast layer 2 flooding and cdp/vtp
Hi AllSomeone knows why Cisco switchs doesn't flood cdp/vtp packets on entire broadcast domain ?In my understanding a switch should perform flooding of Multicast packets out all port but with cdp/vtp packet it doesn't happen.Logically it is correct b...
Hello,About 18 months ago, we stopped using VTP and switched to assigning 'allowed VLAN' to individual interfaces. Everything has been working well. At that time, the contractor had me turn off VTP on the core switch (default gateway) and leave VTP...
We name VLANs and then assign them to trunks with 'allowed VLAN'. This seems to work. On occasion, a client on a different VLAN than the DHCP server does not obtain an IP address. So, I tried to create a VLAN interface for a named VLAN and added an i...
I have a cisco sfp (SFP-10G-SR) and i need to connect it to a DELL sfp (SFP-10G-SR) part number is WTRD1. are they compatible with each other? the dell sfp has the attached info
Hi guys, We got this:We want to understand when the switch marks MAC "flap"? Is there some sort of timer? It s normal for the MAC address to be learned on one port and then another, but I get it's when MAC moves very quickly back switch generates th...
My cisco cat 2960-S keeps on rebooting.can anyone help how to troubleshoot/ or what is the possible cause of this?Thanks
The switches are connected by an optical patch cord. When transmitting data, errors increase on port 4912. Setting the speed and duplex on auto-negotiation or without auto-negotiation - the result is the same. The same cisco 2960S in conjunction with...
Nexus 9k's in vPC, using HSRP for routing. The DHCP Client gets a proper address, but cannot communicate. Cannot ping the gateway at all. But if you set the same address as static, it works. DHCP Relay is configured. I set up a mock Domain that mimic...
Hello, I would like to hear your opinion.I'm just learnig about Cisco switches and routers, and IOS (Internetwork Operating System) commands.There I learned that "to abort DNS lookups, traceroutes, pings, or to interrupt an IOS process, use Ctrl-Shif...
Hi,We have a VTP server-client setup for our Network. Details are as below.1. Layer 3 switch configured as VTP server (with VTP version 2 and VTP pruning enabled).It's having a vlan database of around 90 vlans.2. 57 wifi switches(cisco 2960 24PDL ,PO...
if a series is end of life do this mean that the particular switch/routers also fall under eol,for Eg. Cisco announces the end-of-sale and end-of-life dates for the Cisco Nexus 7000 and 7700 F2-Series Enhanced 48-Port Fiber 1 and 10 Gigabit Ethernet ...
Hi,I am just trying to configure the ethernet interfaces on my Nexus 7010 48 port module. When I do a "show interface" I only see the management interface on the management module and not the 48 port module. When I run a "show hardware" I am able to ...
Resolved! VTP pruning
HI What is the difference between VTP pruning & VLAN pruning in trunk, both are configured by manually and both features prevents the VLAN frame in trunk, then what is the difference ? Thanks in advance
Just getting started with Virtual Stack and Layer 3. I have two MX100, in HA pair mode. I have two MX350-24X switches in Layer 3 mode The MX has DHCP on VLAN1 to provide MGMT IP to the switches. I am blocking all DHCP on the Layer3 switches since I ...
