Category Archives: Cisco

Troubleshooting Cisco ASA 5500 Firewalls

How to view interfaces and descriptions? #show nameif How to remove the entire access list? # clear config access-list <ACL-Name> –There are many things you can delete with the clear config command, be careful with how you use this command. How to view the interface name, IP address and state of the interface, similar toContinue reading “Troubleshooting Cisco ASA 5500 Firewalls”

Creating a SPAN session on a Nexus 9K

Create SPAN session ================================= 9kswitch# conf t 9kswitch(config)# monitor session 1 Configure destination port (destination cannot be a FEX port or a Port-channel!) ================================= 9kswitch# conf t 9kswitch(config)# interface eth 1/15 9kswitch(config-if)# switchport monitor 9kswitch(config-if)# exit 9kswitch(config)# monitor session 1 9kswitch(config-monitor)# destination interface eth 1/15 Configure source port (or VLAN) ================================= 9kswitch(config-monitor)# source interface ethContinue reading “Creating a SPAN session on a Nexus 9K”

Cisco ASA Tunnel Stuff

A few handy LAN-to-LAN Tunnel VPN commands: To display all current IKE security associations (SAs) at a peer. show crypto isakmp sa To display all current IPsec SA’s. show crypto ipsec sa restarting all your ISAKMP VPN Tunnels: clear crypto isakmp sa If you need to reset one VPN then you need to reset the IPSEC SAContinue reading “Cisco ASA Tunnel Stuff”