STATIC ROUTING
By default IP routing process is disabled. To enable IP Routing use the
following command in Global configuration Mode:-
Command:
Router(config)#ip routing
Output:
Kolkata# sh 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 not set
C 10.0.0.0/8 is directly
connected, FastEthernet0/0
C 172.16.0.0/16 is directly
connected, Serial0/0/0
C 172.17.0.0/16 is directly
connected, Serial0/0/1
Once routing is enabled the directly
connected networks are automatically added into the routing table. “C” represents directly connected
networks. The IP Network was learnt through the local Interface of the router.
To configure static Routing use the
following Syntax:
Syntax:
Router(config)#ip route <Destination Network ID> <Destination
Subnet Mask> {<Next hop IP address> or < Exit Interface
type><No.>}
Dest N/W ID: Network ID (of the remote network)
Dest Subnet Mask: Subnet Mask (of the remote
network)
Next hop IP Address: IP Address of the Next Router
(directly connected)
Exit interface type & Number: outgoing interface type and number
STATIC ROUTING – Example 1
Configure Static Route to allow LAN
of Delhi to communicate with LAN of Kolkata and vice-versa:
ON DELHI:-
DELHI #configure terminal
DELHI(config) #ip routing
DELHI(config)#ip route 10.0.0.0 255.0.0.0 Serial 0
DELHI(config) #exit
DELHI#
ON KOLKATA:-
KOLKATA #configure terminal
KOLKATA(config) #ip routing
KOLKATA(config)#ip route 192.168.1.0 255.255.255.0 172.16.0.1
KOLKATA(config) #exit
To verify, the following commands can be give on all Routers
Show commands:
Router#show ip route
Output:
Delhi#sh 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 not set
S 10.0.0.0/8 is directly
connected, Serial0/0/0
C 172.16.0.0/16 is directly connected, Serial0/0/0
C 192.168.1.0/24 is directly connected, FastEthernet0/0
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