After the restart of a 3650 distribution switch stack that is acting as an RP, a downstream switch was not able to send multicast traffic; other parts of the network were not affected. After considerable troubleshooting, we discovered that removing t...
Forum Posts
Resolved! Switch stack boot errors
Hello, should I be concerned with the following output during boot of a switch stack? I'm concerned about the message..Image failed digital signature verificationError loading "flash:/update/c2960x-universalk9-mz.152-4.E8/c2960x-universalk9-m z.152-4...
I ask this question due to the Cisco announcement made at https://www.cisco.com/c/en/us/support/docs/security-vpn/public-key-infrastructure-pki/215118-ios-self-signed-certificate-expiration-o.html#anc15 and am currently looking and trying out differe...
Resolved! Cisco 2850 and Fios Router
Hello, I'm trying to configure a Cisco 3850 with Fios. I'm able ping across platforms and can ping all vlans. I can't connect to the internet when I connects clients to any of the vlans. Here's what I have on the switch: (192.168.1.1 is the Fios ...
You posted this in the Telepresence forum, seems you need assistance with a switch, might want to move your post to a relevant area of CSC
Resolved! StackWise Virtual on C9500-40X
I need to select 6 new switches, and the model that fits my requirement in terms of ports is "C9500-40X".I also need to implement Stack technology on them but according to the datasheet the StackWise Virtual is not supported yet on "C9500-40X" model....
Resolved! SVL C9600 - Disable link SVL
Hi everyone, I need explain about config SLV on C9600:1. When SVL group links down, By DAD link, act switch convert to Act Switch-Recoverry mode, Stanby Sw- active. But SVL up why act sw-recoverry mode cannot switch back to the original. 2. As Cisco ...
Hello ; I have a 3750G switch that it has flash not detected on Roman mode, I try flash_init and dir flash: but no look as below :switch: flash_initInitializing Flash......The flash is already initialized.switch: dirList of filesystems currently regi...
I tried many steps to apply the openssl for issue certificate for 2960. I failed. Please give me clear steps
For a learning purpose I am creating a VLAN using an old switch: catalyst c2950. I used the suggested commands found on this community below : Switch(config)#vlan 10 Switch(config-vlan)#name Restricted LAN Switch(config-vlan)#exit Switch(config)#int...
we have collocation DC where customer can connect external switches not under our control, our aim is to protect our network from any changes done on the external switches cloud lead to L2 loop, we want to stop customers from participating in our STP...
Hello allI can not take an IOS backup from 2960 switch when i ran "show flash" no file displayed as bin extensionHow can i take backup from the switch ios?Can i take a backup from ROMON and how i can do that ?Thank you
I'm trying to ping from router "DC_GE" to Router "BE": The packet tracer file is linked. Any help would be greatly appreciated, thanks a lot! Best regards
Hi, we use two SG350XG-24F as a Stack as core switches and 3 SG350XG-48T as access switches.The stack members are connected on fiber ports 23 and 24. Each access switch is connected via DAC to each stack member. No LAG there.We only created a LAG on...
We are experiencing an odd issue with CDP on our 6509-E and could use a little help. On a connected switch the 6509 will show up multiple times in the CDP neighbor table, some ports on the 6509 have this issue and some don't. Supervisors are WS-SUP...
