router help

Discussion in 'Hardware' started by burbob, Nov 2, 2007.

  1. burbob

    burbob

    Joined:
    Oct 19, 2007
    Messages:
    2
    Iam learing how to use ios for the cisco exams -- and have a few routers and switchs -- iam new to all this so - and cant work out why i can see the other router ( named it jess ) when i do -show cdp neighbor detail i can see the other router- but when i try and ping the ip address it doesnt work - any ideas - see below


    ob>show cdp neighbor detail
    -------------------------
    Device ID: jess
    Entry address(es):
    IP address: 10.1.1.1
    Platform: cisco 2516, Capabilities: Router
    Interface: FastEthernet0/0, Port ID (outgoing port): Ethernet0
    Holdtime : 126 sec

    Version :
    Cisco Internetwork Operating System Software
    IOS (tm) 3000 Software (IGS-I-L), Version 11.1(24a), RELEASE SOFTWARE (fc1)
    Copyright (c) 1986-2001 by cisco Systems, Inc.
    Compiled Fri 09-Mar-01 19:43 by pnicosia

    advertisement version: 1

    bob>ping 10.1.1.1

    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
    .....
    Success rate is 0 percent (0/5)
    bob>
     
    burbob, Nov 2, 2007
    #1
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  2. burbob

    jayesch

    Joined:
    Nov 12, 2007
    Messages:
    6
    Basic checks.
    1. Check if IP and subnet masks on both the interfaces are configured correctly. They should be in same subnet CDP works on layer 2 so you will still see the other router. Layer 3 connectivity is verified by using ping.
    2. Check port speed and duplex mode configuration. You can also check the LEDs on the port. They should be green and blinking. Although this should not be a problem if CDP is discovered but nonethless you might want to check still.
    3. Finally check for any access-list blocking ICMP.
     
    jayesch, Nov 12, 2007
    #2
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