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Forum Posts
Resolved! PVST+, RSTP and RAPID-PVST+
EveryoneI was hoping we could start some discussion with the differences of the following protocols for spanning-tree.I really started to get confused after I am just now learning STP. I do understand that these allow for faster convergence.However -...
Hi, I'm traying to install C1-PI-LFAS-ISR-K9 license to my cisco router ISR4321/K9. Idk what contains that license. It contains UCK9 lic?And I have a problem when Im installing it because router displays this error:% Error: License installation faile...
Hello, I want to disable ipv6 device tracking (SISF) and have followed the instructions below, but I still see ipv6 addresses in the device tracking database.The instructions below were taken from the document. I have created the policy correctly and...
Is it possible to change the cisco switches' public and private key pair?
Good morning, I am having some difficulty with a few 3650 stacks if I upgrade to a code line beyond 16.3. This is for a college dormitory and I have a large amount of Cisco 702W access points on these switches. The 702W can operate in either normal P...
What will be the impact on the network and switches if we create let say 1100 to 1400 VLANs with PVST+ on Cisco Cat Switches - i.e CPU will be high, not supported or any other STP related issues. What is the best practice. Thanks,ZK
Resolved! 4500 VSS Upgrade with no ISSU
Hello Folks! I'd like to ask your help to tell me how to make IOS upgrade on Catalyst 4500 with VSS without impact.I saw some docs using ISSU, but I believe using the copy command and change the boot sequence is easier, but I'm not sure if the proces...
Help!!! I have a 4510+E that the secondary supervisor has shut down and I am getting other temperature alarms. The closet isn't hot and I have a fan blowing on the switch. The fan tray isn't showing any errors. chp-swoh-wan-Wellbash-1#show envwarning...
Hi, I am having some trouble with intervlan routing on this Cisco 3850 switch. 2 PCs connected directly to switch cannot ping each other but can ping their respective default gateway. Am I missing something on this configuration?PC on vlan 2020 has a...
Hi,I'm using a cisco switch WS-C2960-8TC-L which is showing this error message several times almost every day:%SUPQ-4-CPUHB_RECV_STARVE: Still seeing receive queue stuck after throttling.I have lost connectivity with it several times, Is it related w...
I've replaced a 100mb cisco 2960 with a cisco sg300-52p gigabyte switch.3 vlans configured 175 for internal,176 for external and 177 for management.changed the native vlan from 1 to 177assigned a ip to vlan 177problem is we cannot connect remotely to...
Hello all!I have a Ubiquiti ER-4 in my hub office, that I am trying to connect to an ASA 5515 VPN in the datacenter. I have match the pre-shared keys and gone through the Config Wizard (https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-s...
Good Day, I am using Alleid Telesis SFP (AT-SPBD10-13/AT-SPBD10-14) transceivers between Cisco two 9200 (C9200L-24T-4G-E/A with latest IOS images) and also tried on Cisco (3650-24T with latest IOS images) but without any success. I followed the proc...
I need to change de IOS XE version on a pair of 3850-12XS, they are in INSTALL mode: Switch#show ver | i INSTALL * 1 16 WS-C3850-12XS 16.3.1 CAT3K_CAA-UNIVERSALK9 INSTALL I am follo...
Hello,I had a weird problem, where a mac address of a specific Laptop blocked in a very specific VLAN and switch. First it was blocked because of a portsecurity violation. I deleted the PortSecurity and had the same problem. But when i change the vla...
