Chapter 6

1:
A:	Using secondary IP addresses, a subnet of 192.168.5.0 must be added to the Ethernet interfaces of RTE and RTF to connect the noncontiguous subnets of those routers' Token Ring interfaces. The IGRP configurations are: RTA routerigrp50 network192.168.2.0 RTB routerigrp50 network192.168.2.0 RTC routerigrp50 network192.168.2.0 network192.168.3.0 RTD routerigrp50 network192.168.3.0 network192.168.4.0 RTE routerigrp50 network192.168.4.0 network192.168.5.0 RTF routerigrp50 network192.168.4.0 network192.168.5.0
2:
A:	The minimum bandwidth of the route is that of RTD's Ethernet interface. The total metric is the sum of this bandwidth and the delays of each interface: 1000 + 10 + 7 + 100 + 63 = 1180
3:
A:	The minimum bandwidth of the route is that of RTD's Ethernet interface. Because K5 is nonzero, the formula is Fractional portions of the metric are dropped, so the metric of the route from 192.168.2.96/27 to 192.168.5.96/27 is 3.
4:
A:	The lowest metric of the five paths between the two FDDI networks is 698, and the highest is 21541. 21541/698 = 30.86, so the commands that must be added to the IGRP configurations of the two routers are maximum-paths 5 and variance 31 .