Ubigate iBG2016 Configuration Guide/Ed.00© SAMSUNG Electronics Co., Ltd. 163Establishing a Trunk-Using Explicitly Defined PathThe Explicit Route hops can be configured explicitly in the trunkconfiguration. In this case, the RSVP daemon uses the configured hops asERO. It sets up the LSP using specified hops only. For a detailed descriptionof the path parameters refer to the RSVP-TE Command Reference.Explicitly specified hops can also be used when CSPF is enabled. In this case,CSPF uses the specified hops as constraints while computing the ExplicitRoute to be sent to the RSVP daemon.As ERO is composed of IP addresses called hops. An ERO hop can be definedas loose or strict. A loose hop can be reached by any available route. Whereas,a strict hop must be reached via a direct link and cannot be routed over anyalternate routers in between.In this example, since R1 is defined as loose hop, R2 can use R4 as anintermediate hop to reach R3. However, if it was strict then R2 would have touse interface Ethernet 1/1 to reach R3 directly.Figure 9.7 Explicitily Defined PathR1-RSVP-TERouter#configure terminalRouter/configure# rsvp-path P1Router/configure/rsvp-path# hop-address 10.10.23.60Router/configure/rsvp-path# hop-address 10.10.21.90Router/configure/rsvp-path# exitRouter/configure# rsvp-trunk T1Router/configure# primary no-cspfRouter/configure/rsvp-trunk# primary path P1Router/configure/rsvp-trunk# to 192.168.0.90Router/configure/rsvp-trunk#lo192.168.0.63 eth 2/1192.168.0.60192.168.0.90eth 0/0R1R2 eth 1/110.10.23.0/24 10.10.21.0/24eth 0/1loloeth 2/1 eth 1/1eth 2/1R2R3eth 1/110.10.24.0/2410.10.12.0/24
