Cisco Systems 78-11741-02 manual IP Accounting Example, Hsrp Load Sharing Example, IPC-126

Configuring IP Services

IP Services Configuration Examples

deny tcp 171.69.0.0 0.0.255.255 any eq telnet

IP Accounting Example

The following example enables IP accounting based on the source and destination MAC address and based on IP precedence for received and transmitted packets:

interface Ethernet0/5

ip accounting mac-address input ip accounting mac-address output ip accounting precedence input ip accounting precedence output

HSRP Load Sharing Example

You can use HSRP or Multiple HSRP when you configure load sharing. In Figure 20, half of the clients are configured for Router A, and half of the clients are configured for Router B. Together, the configuration for Routers A and B establish two Hot Standby groups. For group 1, Router A is the default active router because it has the assigned highest priority, and Router B is the standby router. For group 2, Router B is the default active router because it has the assigned highest priority, and Router A is the standby router. During normal operation, the two routers share the IP traffic load. When either router becomes unavailable, the other router becomes active and assumes the packet-transfer functions of the router that is unavailable. The standby preempt interface configuration command is necessary so that if a router goes down and then comes back up, preemption occurs and restores load sharing.

Figure 20 HSRP Load Sharing Example

Active router for group 1
Standby router for group 2
Router A
E0	10.0.0.1

Active router for group 2

Standby router for group 1

Router B

E0 10.0.0.2

72343

Client 1 Client 2 Client 3 Client 4

The following example shows Router A configured as the active router for group 1 with a priority of 110 and Router B configured as the active router for group 2 with a priority of 110. The default priority level is 100. Group 1 uses a virtual IP address of 10.0.0.3 and Group 2 uses a virtual IP address of 10.0.0.4.

Cisco IOS IP Configuration Guide

IPC-126