TAILIEUCHUNG - CCNP Routing Study Guide- P15

CCNP Routing Study Guide- P15:T his book is intended to help you continue on your exciting new path toward obtaining your CCNP and CCIE certification. Before reading this book, it is important to have at least read the Sybex CCNA: Cisco Certified Network Associate Study Guide, Second Edition. You can take the CCNP tests in any order, but you should have passed the CCNA exam before pursuing your CCNP. | Route Maps 385 where routemail is an arbitrary name chosen for the route map 10 is the route map sequence number and the sequence number is 10 by default unless another number is specified. We will now set the criteria for the first match clause match ip address 101 where 101 is the access list that the match clause is checking traffic against. We will now use the set clause to specify the next-hop address of traffic satisfying the match clause set ip next-hop where is the IP address of the next-hop router. Finally we need to specify where to send traffic if the match condition is not met route-map routemail permit 20 set ip next-hop where 20 is the sequence number and is the next-hop router. RouterA will now send all SMTP traffic over the 56Kbps link to RouterC and all other traffic over the link to RouterB as shown in Figure . FIGURE Policy routing configuration for example 1 ISP A RouterB 24 s1 SMTP 24 Internet access-list 101 permit tcp any any eq 25 route-map routemail permit 10 match ip address 101 set ip next-hop route-map routemail permit 20 set ip next-hop WWW FTP etc. Company A RouterA. s0 link 24 24 56Kbps link ISP B RouterC Copyright 2001 SYBEX Inc. Alameda CA 386 Chapter 10 Route Optimization Policy Routing Subnets As another example consider the following scenario. Company A has the same ISP connections as in the previous example. Inside Company A we have two VLANs the Engineering VLAN 24 and the Accounting VLAN 24 as illustrated in Figure . Our goal is to direct traffic from the Engineering VLAN 24 out the link interface s0 and to direct traffic from the Accounting VLAN 24 out the 56Kbps link interface s1 . FIGURE Policy routing example 2 First we need to create our access lists specifying the conditions we re looking for that is .

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