Advertising a default route in BGP

There are four ways to distribute a default route in BGP. Three of them, the network, the default-information originate and redistribution from another routing protocol, are all similar in the resulting effect: they will inject the default route into BGP RIB and it will be advertised to all BGP neighbors. The difference is inContinue reading “Advertising a default route in BGP”

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”

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”