Routing protocol commands list
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The document provides a comprehensive list of routing protocol commands for Cisco routers, detailing static routing, RIP, EIGRP, and OSPF configurations. It covers command syntax for setting up and verifying routing protocols, alongside critical procedures for backing up and restoring Cisco IOS and router configurations. Additionally, it includes commands for managing CDP settings and configuring DNS to resolve names.
Routing protocol commands list
- 1. Routing protocol commands list CCNA Routing Protocol Commands IP ROUTING #sh ip route // To view IP routing tables created on a Cisco router. Static Routing Routers are manually configured for networks that are not directly connected, to be able to route to all networks via the next-hop interface. Syntax: (config)#ip route 192.168.10.0 255.255.255.0 192.168.20.2 (config)#no ip route 192.168.30.0 255.255.255.0 192.168.20.2 //To remove a static route // Please note the ‘no’ which is the word used in routers to negate any command Default Routing Used on stub networks only to send packets with remote destination network not in the routing table to the next hop router. Syntax: (config)#ip route 0.0.0.0 0.0.0.0 192.168.40.1 RIP (Routing Information Protocol) A distance vector routing protocol that passes complete routing table contents to neighbouring routers Example– Let 192.168.10.0 & 192.168.20.0 be directly connected networks of a router interfaces and 192.168.30.0 be non-directly connected Syntax 1: (config)#router rip (config-router)#192.168.10.0
- 2. (config-router)#192.168.20.0 (config-router)#exit Verifying RIP 1.Sh ip route 2.debug ip Syntax 2: (config)#router rip (config-router)#network 192.168.10.0 (config-router)#passive-interface serial 0/0 //In this case we have used the interface address rather a IP address EIGRP Proprietary of CISCO Uses classless routing which is subnet mask information sent with routing protocol updates. Example– Let 192.168.10.0 & 192.168.20.0 be directly connected networks of a router interfaces with autonomous system number of 20 and 192.168.30.0 be non- directly connected Syntax 1: #router eigrp 20 (config-router)#network 192.168.10.0 (config-router)#network 192.168.20.0 (config-router)#^z Syntax 2: (config)#router eigrp 20 (config-router)#passive-interface serial 0/0
- 3. To enable EIGRP on discontiguos networks(two different subnetworks of classfull network connected by another different classful subnetwork) Example- Let 172.16.0.0 & 10.0.0.0 be directly connected to a router to another remote subnetwork of 192.168.10.0, then to enable EIGRP, we use (config)#router eigrp 100 (config-router)#network 172.16.0.0 (config-router)#network 10.0.0.0 (config-router)#no auto-summary HINT: The no auto-summary command should be enabled in routers that encloses such networks. Verifying EIGRP 1. sh ip route //Shows entire routing table 2. sh ip route eigrp //Shows only EIGRP entries in the routing table 3. ip eigrp neighbours // Shows all EIGRP neighbours 4. ip eigrp topology // Shows entries in the EIGRP topology table OSPF A link-state routing protocol Example– Let 10.0.0.0 be the network directly connected to the router upon which OSPF is to be enabled; with ospf ID of 1 and area o (config)#router ospf 1 (config-router)#network 10.0.0.0 0.255.255.255 area0 Loopback Interface– They are configured to be used as the routers RID to advertise the routes and elect DR and BDR. Example– Let the loopback iinterface be configured on interface with ip 172.16.10.1 (config)#int loopback 0 (config-if)#ip address 172.16.10.1 255.255.255.0
- 4. (config-if)#no shut (config-if)#^z Verifying OSPF Configuration 1. sh ip ospf // Used to display all OSPF information 2. sh ip ospf database // indicates the number of links and neighboring router ID 3. sh ip ospf interface //Displays all OSPF interface related info 4. sh ip ospf neighbour // Summarizes OSPF info about neighbours 5. sh ip protocols // Overview of all present running protocols Verifying Loopback and RID 1. sh running-config // To verify loopback address 2. sh ip ospf database // Verifies the new RID of each router 3. sh ip ospf interface // Verifies the new RID of each router IMPORTANT COMMANDS Checking the Current Configuration Register Values show version or show ver Changing Configuration Register (config)#config-register 0x101 (d default is 0x2102) Recovering Passwords in Router 1. Interrupt the Router Boot Sequence ctrl+Break key (windows wont perform break key, only 95/98) 2. Changing the configuration register for 2600 series router rammon>confreg 0x2142 for 2500 type 0 after a break and enter the command o/r 0x2142
- 5. 3. Reloading the Router and Entering Privilged mode for 2600-type reset for 2500-type I 4. Viewing and changing the configuration copy run start 5. Resetting the configuration Register and Reloading the Router config t config-register 0x2102 copy run start-to save Backing up and restoring the Cisco ios 1. verifying flash memory-Ensuring flash memory has enough room router#sh flash 2. Backing-up the ciso ios first verify server connectivity by- Router#ping 192.168.0.120 then; (config-router)#copy flash tftp 3. Restoring or upgrading the cisco router ios router#copy tftp flash Backing up and Restoring the Cisco configuration 1.Backing up the cisco router configuration copy runing config tftp 2. verifying the current configuration sh run 3. copying the current cofiguration to NVRAM copy run start 4. copying the current configuration to a TFTP server copy run TFTP 5. Restoring the Cisco Router Configuration
- 6. copy TFTP run 6. Erasing the configuration erase startup-config Getting CDP timers and Holdtime information Router#config t Router(config)#cdp timer 90 Router(config)#cdp holdtime 240 Router(config)#^z To turn-off CDP Completely Router(config)#no cdp run Using DNS to resolve names #config t (config)#ip domain-lookup (usually turned on by default) (config)#ip name-server 192.168.0.70 (ip of an assumed DNS set) (config)#ip domain-name india-router.com (Appends the domain name to a host) (config)#^z