Hello,I am wondering how long it takes to propagate a change of the root bridge in Rapid Spanning Tree Protocol:Example:From: Switch Root ===DSG, SW1 root [default priority 32,768]To:switch Root== DSG, SW1 [Priority 32,768 ] Root ==uplink== DSG ,SW2 ...
Forum Posts
I've got a few 9410 switches with Supervisor 1's in them, and one of them is giving me issues.On the previous upgrade to 17.9.7, I had issues with Supervisor 2 (dual sup's in all) and I had a failure of Sup 2 to boot after a non-ISSU upgrade. Previo...
Resolved! QoS best-effort in C1300
I need to configure the switches so that every movement, without exception, is treated as best-effort. I have no implementation experience in QoS, so I have prepared this configuration and am wondering if it will be sufficient.switch(config)#qos basi...
Hello,Could you please confirm the C9200L-48P-4, like other C9200 or C9200L can do only DATA stack (StackWise) with C9200L-STACK-KIT, and this not possible to have power stack ?Do you have any Cisco document that specifically mentions that ? I cannot...
Hello Experts,I have 2 switches in vPC domain. switch1 is primary and switch2 is secondary. eth1/47-48 are keepalive links in port-channel. And eth2/23-24 are peer links in port-channel. We had one activity scheduled last night to replace faulty QSFP...
Hi Team, I have nutanix cluster/VM's which are connected to Cisco 1300-12X-2X switches which are stacked and i see only this LACP has Auto/ON options. these are L2 switches . My uplink is Cat 3850 and has portchannels configured between L3 switch and...
Hello Pros. I recently installed two Cisco 9200 C9200L-48PL-4X (Stack wise) and upgrade to IOS (17.12.05 CAT9K_LITE_IOSXE). When I checked show version I found something that I never paid attention and don't know what is that mean and how to resolve...
Hi Everyone,I need some advice on a real issue I faced recently at work.In my company we mainly use Cisco Meraki devices in the access and distribution layer. Core layer is sometimes Meraki and sometimes other vendors.One day I connected a Planet man...
show controllersのレジスタの見方を教えてください。インターフェースのスピード/デュプレックスが対向ともにauto/autoに設定しているのに1000Mbpsにならず100Mbpsとなる原因を対向機、LANケーブル、自機のどこにあるのか特定するのが目的です。出力結果は以下の上段で下段は同じ機器構成の同じインターフェースで1000Mbpsでている比較対象事例です。各ビットが意味するところが分かるとよいのですが。機種：C2960L-UNIVERSALK9-M、Version 15.2(...
Resolved! Static MAC Address Configuration
Hi I try to configure the static MAC Address on the Cisco Nexus N9000, but it prompts the error message "Invalid MAC: multicast/broadcast not supported!". Is any expert know why prompt this error message CoreSW01(config)# mac address-table static 03b...
I have a Catalyst 3650 with a L3 interface connected to a C921-4P router that is terminating some RAVPN PPPoE sessions. The C921-4P is attempting to relay the DHCPv6 messages from the client to a Windows DHCPv6 server. I'm only using DHCPv6 for oth...
Hi. We are 2 IT students trying to configure a router for our school. Our Router is a 1841 with a switch modul.It is a learning experience for us, where we have to make due with whatever equipment we have.Thanks for your time!We are having some probl...
Resolved! Cross stack etherchannel with LACP issue
I have 2 cisco stacks with 2 switches of IE-9320-26S2C each with firmware 17.12.04. We have etherchannel configured between the two switches with the physical interfaces from each members on the stack.When we power off one of the switches in the stac...
I have a question I'm hoping somebody can explain in layman's terms for me regarding the inner workings of line rate speeds. I've attached a very basic drawing of an example camera network. A PoE camera connects via Ethernet to a local switch at 1 G...
Hello, We have CoreSwitches configured as DHCP servers and Layer3 for several Vlans but we started noticing DHCP timeouts and after analysis we found out that devices are sending a DHCP request almost every 2 minutes even if the lease time is configu...
