| The following line tells the router the speed of the physical network hardware connected to this network interface. Routers and csu/dsu's typically do not implement any logic for the csu/dsu to actually inform the router of the speed of it's connection over the telecommunications line to the other end of the link. In this case, the speed between the router's serial interface and the csu/dsu is 1.544Mbps. However, the speed between the csu/dsu at this end of the link and the other end is only 64Kbps. Without this statement in the router, the router will give the link off of this interface as much priority to deliver packets to other parts of the network as one that actually has a full 1.544Mbps of connectivity behind it. This would quickly overload the 64Kbps link, if allowed to. |
| The following two lines provide a default destination for this router to deliver packets destined for networks which it has no entry in its routing table. There are two entries because this router has twodifferent links it can use to forward packets on through. The entry with the number 200 at the end of it is normally placed into the routing table as the gateway of last resort, *unless* the link on this router which is numbered with the 10.0.140.0 network is down. In that case, the entry with the 210 at the end of it is placed in the routing table. 200 and 210 are routing metrics which allow the person configuring the router to tell the router how to prioritize static route entries to the same destination. The lower the metric number, the *higher* in order of precedence that router gives to the entry. The default metric for a static route is 0, normally giving it priority over any other entry to the same destination. In this case, the static route with the metric of 200 directs packets over the true 1.544Mbps T1 link. The static route with the 210 metric directs traffic over the other link that only runs at 64Kbps. |
logging buffered 16384
logging trap debugging
logging facility syslog
logging 128.119.86.2
snmp-server community ecsro RO
snmp-server community ecsrw RW
snmp-server location ECS Computer Networking Lab, UMass, Amherst
snmp-server contact John Jackson - johnj@external.umass.edu
snmp-server chassis-id SEA1
snmp-server system-shutdown
banner motd
sea1.hackme.net
UMass ECS Computer Networking Lab
*** AUTHORIZED USE ONLY ***
!
line con 0
exec-timeout 0 0
login
line 1 16
exec-timeout 0 0
password ecs
line aux 0
exec-timeout 0 0
password ecs
login
line vty 0 3
exec-timeout 0 0
password ecs
login
line vty 4
exec-timeout 5 0
password ecs
login
!
ntp clock-period 17179416
ntp server 10.0.75.1
end