™ Cisco CCNA Examination Tutorial: IGRP And Equivalent Cost Load Balancing To pass the CCNA exam, you’ve received to understand the position in the bandwidth command with IGRP and EIGRP and when to employ it. During this tutorial, we’ll configure IGRP over a body relay hub-and-spoke network working with the subsequent networks: R1 (the hub), R2, and R3 are working IGRP over the 172.12.123.0 /24 network. It is a T1 line. R1 and R3 also are linked on a distinct subnet, 172.12.13.0 /24. The bandwidth of the connection is 512 KBPS. R2 and R3 are also connected by an Ethernet phase, 172.23.0.0 /sixteen. We’ll configure IGRP on R1, R2, and R3 with the router igrp 1 command. IGRP will operate on all interfaces within the 172.twelve.0.0 and 172.23.0.0 network. R1#conf t R1(config)#router igrp 1 R1(config-router)#community 172.12.0.0 The 1 from the router igrp command refers to the Autonomous Method (AS). IGRP is a classful routing protocol, so wildcard masks are not Utilized in the community statements. R2#conf t R2(config-if)#router igrp one R2(config-router)#network 172.12.0.0 R2(config-router)#community 172.23.0.0 R3#conf t R3(config-if)#router igrp one R3(config-router)#network 172.twelve.0.0 R3(config-router)#network 172.23.0.0 Operate clearly show ip route on R1. R1 will see three equivalent-cost paths on the Ethernet network. IGRP supports load-sharing more than as much as 4 equal-Value paths by default, so all 3 paths surface within the routing desk. R1 will even see a path to the loopback address on R2 and two routes into the loopback deal with on R3. (You may also run clearly show ip route igrp in order to see only the IGRP routes.) R1#show ip route igrp I 172.23.0.0/16 [one hundred/8576] by using 172.12.123.2, 00:00:02, Serial0 [100/8576] via 172.12.13.three, 00:00:02, Serial1 [a hundred/8576] by way of 172.twelve.123.three, 00:00:01, Serial0 Take into account that the quantities in the brackets next the community amount in the routes are the Administrative Distance and also the IGRP metric, in that get. Note that classful masks are in use. IGRP won't aid variable-length subnet masks (VLSM). There's two serial connections among R1 and R3. IGRP is assuming that both equally strains are T1 traces, functioning at 1544 KBPS. The 172.twelve.13.0 network is participating in equal-Expense load sharing as a consequence of IGRPs bandwidth assumption – that every one serial interfaces are linked to T1 traces. To offer IGRP a more accurate image in the networks bandwidth, configure bandwidth 512 on R1 and R3s Serial1 interface (the interfaces over the 172.12.13.0 community). R1(config)#interface serial1 R1(config-if)#bandwidth 512 R3(config)#interface serial 1 R3(config-if)#bandwidth 512 IGRPs assumption that all serial strains operate at 1544 KBPS is overridden with the bandwidth 512 command. IGRP now believes this line runs at 512 KBPS. To see the outcome of the command, obvious your routing table on R1. R1#very clear ip route * I 172.23.0.0/16 [a hundred/8576] by using 172.twelve.123.three, 00:00:24, Serial0/0 [one hundred/8576] by means of 172.twelve.123.2, 00:00:17, Serial0/0 The routing table is cleared with crystal clear ip route *. To determine just the routes gained in IGRP updates as opposed to your complete desk, run exhibit ip route igrp. On the list of paths to 172.23.0.0 is currently long gone – the route that went in the 172.twelve.thirteen.0 network. Given หนังใหม่2023 that IGRP sees that hyperlink as slower in comparison to the others, equal-Expense load balancing will not come about more than the 172.12.thirteen.0 network. Its vital that you realize that the bandwidth command would not in fact alter the bandwidth in the relationship; it adjustments IGRPs assumption of what the bandwidth is. In another aspect of this IGRP load-balancing tutorial, we’ll Examine how you can configure unequal-Expense load balancing.
0 Comments
Leave a Reply. |
ArchivesCategories |