Hello,I have 2 Cisco Stack switchs connect to 2 Aruba Stack Switchs.On CIsco switch, i configured port-channel (also from Aruba switchs). Everything works very good.But yesterday, i powered off the 2 Aruba Switchs and just after i powered on.But afte...
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Hello and sorry for my bad english. I'd like to know if my port-channel configuration is bad because i don't know if i have to put this command on port-channel only, on port or on both :switchport trunk native vlan 999switchport mode trunkswitchport ...
Hello,On my main Cisco Cisco is configure stormcontrol. I have this command : errdisable recovery cause storm-controlerrdisable recovery interval 400and on each ports, i have :storm-control broadcast level 1.00storm-control multicast level 10.00Do yo...
Hi,We have standalone Cat 6500 Core switch with couple of VLAN, GW, static routing configured and connected to single internet FW.Now, I would like to migrate this core to new cat 9500 device with minimum downtime. Please help me with steps:
Hello all, I am using four ConnectX6-DX NICs and one Cisco N5624Q switches (with two modules) to buildup a RoCEv2 cluster. So it's a dumbbell topology where each switch module is connected to two CX6DX nodes, and all links are 40 Gbps: (2 nodes w/ CX...
Hi All,I would like to understand the concept about the power requirement for Cisco 9400.The Cisco 9400 with the power supply C9400-PWR-3200AC, with the power cord CAB-I309-C19-INTL. Understand that there is cordset rating for each type of the power ...
Hello Cisco Community!I’m an old Novell/Windows NT IT guy, who is now a technology tinkerer. Trying to understand some of these new terms, also, unfortunately, I have forgotten a good amount - as you will see in my questions below ☹. I recently purch...
Hi,I want to add a new stack member to an existing stack of C9300 switches.I've searched the web and I could find information about if it is safe to unscrew the STACK-T1-1M cables while all the switches are powered on in order to break the ring and m...
%DOT1X-5-FAIL: Switch 1 R0/0: sessmgrd: Authentication failed for client (0076.861a.2790) with reason (AAA Server Down) on Interface Gi1/0/17 AuditSessionID 099FA8C00000001E973BE640 Username: CP-7821-SEP0076861A2790May 20 18:21:18.739: %DOT1X-5-RESUL...
One of our Cisco 3560 switches keeps showing this warning: Description: Gi0/15: Detected a Loop back. Port has been Disabled. Recommendation: Check Configuration of the switch, also make sure devices connected to the switch are not mirroring the traf...
Resolved! MACSEC Switch to Switch supported models
Dear All,I am planning to change my olds switching infrastructures.That now is composed by two core switches 6500E with sup2T and serveral 4500 sup8 as distribution layer and 9300 switches as access layer.I'd like enable the MacSec security features ...
Hello @All,is that possible to use SFP-10G-LR-S= on Port 49-54 instand of QSFP28 with Linkspeed 10Gig?The spec that: The uplink can support up to six 40- and 100-Gbps ports, or a combination of 1-, 10-, 25-, 40, 50-, and 100-Gbps connectivity, offeri...
Resolved! Best Practice For Upgrading IOS?
Hello all. I have been looking at switches in a client's network and I've found that these Catalyst 2960 (WS-C2960S-48FPS-L) are running IOS version 12.2(55)SE3 and 12.2(55)SE5. These are the universalk9 IOS images. I'd like to upgrade these to curre...
Resolved! Cisco IOS upgrade in depth
Hello all, Can anyone help me with IOS upgrade for Cisco switch and router.1st case:- Upgrade IOS on switch.What I should always have:-I will have a laptop with the free tftp software on it.I should have a straight-through ethernet cable, and free Pu...
I have about 20 switches that need to have firmware updates, What is the best way to do it? TFTP? USB? Was thinking of putting the file on USB, uploading it that way than loading it that way. But everything I read says I need to reload the switch, i...
