Hello, Cisco Community!I’m really happy to share that I’ll be hosting the Cisco Community Lab Series, a brand-new hands-on learning journey designed to help you build practical networking skills step by step.Every Thursday at 8 PM EST, I’ll post a ne...
Forum Posts
Resolved! ARP MAC is all Fs or all 0s.
Hi All,So I had captured an ARP packet and can see that Ethernet header has all FFs for an arp broadcast request while all 0s for Target MAC in the ARP header. Can someone shed light on this?Regards.
We are replacing some of our older switches with the WS-C3850-48P-L. I am having a strange issue where these switches wont power up a POE device after a week or two. For example, I racked the switches plugged in a phone and all seemed fine. We bac...
How do the OSPF will work with Multiple VLANS and Multiple Layer 3 Switches, need an explaining PKT file with all written Configuration Commands? Regards
Resolved! SSH Problem
HelloWe recently bought a 3750G-24TS-S (refurbished) switch and got into trouble to set the SSH on it. The problem arises when the configuration is finished. Everything is working properly and, before exiting the Express Setup, I connected to the swi...
Just wondering if anyone has run into these messages:BGP-3-NOTIFICATION: sent to neighbor x.x.x.x passive 6/0 (CEASE: unknown subcode) 0 bytesBGP-5-ADJCHANGE: neighbor x.x.x.x passive vpn vrf BLAH Down Error during connection collision I've not had m...
I've been trying to create a stackwise virtual link between a couple of C9500-48Y4C switches. I've configured the stackwise virtual domain on both switches and configured the interfaces that we're going to use for the link. Reloaded the switches but ...
Hello, we have 2 Cisco SG350x switches stacked. Firmware is v2.5.7.85.AutoSmartport and Auto Voice VLAN is enabled.Connecting a ip phone/desktop to the switch on unit 1 everything working. The switch detects the phone onthat port and changing Vlan Mo...
Hi,all: I am sure there is a bug on C2960L (software c2960l-universalk9-mz.152-6.E2b.bin or newer) when use snmp to get mac forward table. config like below-------------Building configuration...lldp run!interface Port-channel1!interface Port-chann...
Hello Cisco community, I have an issue with IOS upgrade for WS-C2960X-24PS-L in the stack.After the reload , switch still boot up with the original IOS 15.2(6)E2 , not with requested IOS c2960x-universalk9-mz.152-7.E3.bin MD5 checksum is OK. Other ...
Resolved! C3650 Upgrade licencing issue
Hi guys, We're upgrading our Cisco network devices from old software versions to new ones - however this now means we need to convert to Smart licences. On the C3650s, we are moving to 16.9.6, and the device we're testing on has gone into EVALUATION ...
According to Command Reference, Cisco IOS XE Fuji 16.9.x (Catalyst 3850 Switches) - Stack Manager and High Availability [Cisco Catalyst 3850 Series Switches] - Cisco I can use "session" command to access the diagnostic shell of a specific stack membe...
Hi All,I am using packet tracer and am simply trying to enable some standard ACL's on the switches.I am wanting to follow the Deny all principle then permit what is necessary. I wish for the following to communicate:CORP Client - Internet AccessCORP ...
HI,I wanted recently replace 2 x 2960-x stacked switches with 2 x 3850-x stacked switches, I "copied" configuration from 2960 to 3850, however after booting up iSCSI interfaces didn't come up (however all interfaces were green) , I restarted switches...
Do you know if any outage is expected when changing LACP rate from slow to fast?Any experience or information would be appreciated.Also please advise if there's any test environment lab to check this kind of configurations.
