[CCNA] Static and Default Route

In this lab, you have to config the routers both HQ and BR-1 to make the connection throughout the network and with the Internet.

Static and default route

So all you have to do are:

  1. Enable and set IP address on LAN interface of each router to be the last assignable IP of each subnet.
  2. Enable serial interface on each router and set IP address on each interface as:
    • s0/0/0 on BR-1: last IP of 52.7.9.220/30
    • s0/0/0 on HQ: first IP of 52.7.9.220/30
    • s0/1/0 on HQ: last IP of 77.7.7.252/30
  3. Set static route of each LAN on each router to let PC-1 connect to PC-2. (Use destination interface instead of IP next hop.)
  4. Set default route on each router to let both PC-1 and PC-2 be able to connect to the Server (72.76.5.3) in the internet.
  • On HQ:
HQ>en
HQ#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
HQ(config)#interface fastEthernet 0/0
HQ(config-if)#ip address 52.7.9.206 255.255.255.240
HQ(config-if)#no shutdown 

HQ(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

HQ(config-if)#
HQ(config-if)#int serial 0/0/0
HQ(config-if)#ip address 52.7.9.221 255.255.255.252
HQ(config-if)#no shutdown 

%LINK-5-CHANGED: Interface Serial0/0/0, changed state to down
HQ(config-if)#
HQ(config-if)#int serial 0/1/0
HQ(config-if)#ip address 77.7.7.254 255.255.255.252
HQ(config-if)#no shutdown 

HQ(config-if)#
%LINK-5-CHANGED: Interface Serial0/1/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0, changed state to up

HQ(config-if)#
  • On BR1:
BR1>en
BR1#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
BR1(config)#interface fastEthernet 0/0
BR1(config-if)#ip address 52.7.9.214 255.255.255.248
BR1(config-if)#no shutdown 

BR1(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
BR1(config-if)#int serial 0/0/0
BR1(config-if)#clock rate 64000
BR1(config-if)#ip address 52.7.9.222 255.255.255.252
BR1(config-if)#no shutdown 

BR1(config-if)#
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to up

BR1(config-if)#

To configure the static route and default route also:

  1. Static route: allows you to educate the router to new places.
  2. Default route: acts as “Catch-All”
  • On HQ :
HQ(config)#ip route 52.7.9.208 255.255.255.248 serial 0/0/0
HQ(config)#ip route 0.0.0.0 0.0.0.0 serial 0/1/0
HQ(config)#^Z
HQ#
%SYS-5-CONFIG_I: Configured from console by console

HQ#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is 0.0.0.0 to network 0.0.0.0

     52.0.0.0/28 is subnetted, 1 subnets
C       52.7.9.192 is directly connected, FastEthernet0/0
     77.0.0.0/30 is subnetted, 1 subnets
C       77.7.7.252 is directly connected, Serial0/1/0
S*   0.0.0.0/0 is directly connected, Serial0/1/0
HQ#
  • On BR-1:
BR1(config)#ip route 52.7.9.192 255.255.255.240 serial 0/0/0
BR1(config)#ip route 0.0.0.0 0.0.0.0 serial 0/0/0
BR1(config)#do show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is 0.0.0.0 to network 0.0.0.0

     52.0.0.0/8 is variably subnetted, 3 subnets, 3 masks
S       52.7.9.192/28 is directly connected, Serial0/0/0
C       52.7.9.208/29 is directly connected, FastEthernet0/0
C       52.7.9.220/30 is directly connected, Serial0/0/0
S*   0.0.0.0/0 is directly connected, Serial0/0/0
BR1(config)#

I hope this been informative for you, enjoy !

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