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và các thuật toán RSA và tương tự như PKE. Hệ thống PKDS được sử dụng như cơ chế trao đổi khóa phiên, trong khi các hệ thống PKE thường được coi là đủ nhanh để mã hóa các thông báo hợp lý nhỏ. Tuy nhiên, hệ thống PKE như RSA này không được coi là đủ nhanh để mã hóa một lượng lớn dữ liệu như toàn bộ hệ thống tập tin | 892 Chapter 8 Cisco PIX Firewall Configure ethernet2 as follows. PIX1 config nameif ethernet2 state security25 PIX1 config interface ethernet2 100full PIX1 config ip address state PIX1 config failover ip address state PIX2 config nameif ethernet2 state security25 PIX2 config interface ethernet2 100full Only a single command is required to make this the stateful failover interface PIX1 config failover link state Monitoring Failover The primary method of monitoring failover activity is the show failover command relays everything you want to know about failover. PIX1 show failover Failover On Cable status Normal Reconnect timeout 0 00 00 Poll frequency 3 seconds This host Primary - Active Active time 400 sec Interface state Normal Interface outside Normal Interface inside Normal Other host Secondary - Standby Active time 0 sec Interface state Normal Interface outside Normal Interface inside Normal Stateful Failover Logical Update Statistics Link intf3 Stateful Obj xmit xerr rcv rerr General 3 0 3 0 sys cmd 3 0 3 0 up time 0 0 0 0 xlate 0 0 0 0 tcp conn 0 0 0 0 udp conn 0 0 0 0 ARP tbl 0 0 0 0 RIP Tbl 0 0 0 0 Cisco PIX Firewall Chapter 8 893 Logical Update Queue Cur Information Max Total Recv Q 0 1 3 Xmit Q 0 1 3 Some of the output of this command merits further explanation. Status of the failover cable Normal The primary and secondary firewalls are connected properly. My Side Not Connected The failover cable is not connected to the firewall on which the command was typed. Other Side is not Connected The failover cable is not connected to the other firewall. Other Side Powered Off The failover cable is connected but the other firewall is powered off. Interface status Normal The interface is functioning properly. Link Down The line protocol on the interface is down. Failed The interface has failed. Shut Down The interface was administratively