Sniffing Route Propagation

boostinbadgerboostinbadger Member Posts: 256
in CCNA & CCENT
I have three routers that I would like to watch propagate on my sniffer. Where should I place the hub? Can I set the ethernet port on one for port monitoring to see all router traffic?
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  • cisco_troopercisco_trooper Member Posts: 1,441 ■■■■□□□□□□
    If these are Cisco routers why don't you consider using the debug feature on them?
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  • boostinbadgerboostinbadger Member Posts: 256
    They are Cisco routers (two 2610s & a 2620XM). I am also currently studying Wireshark and would prefer using it.
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  • boostinbadgerboostinbadger Member Posts: 256
    What about port monitoring commands on one of my three switches?
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  • boostinbadgerboostinbadger Member Posts: 256
    Also, if anyone has a unique or neat topology configuration recommendation I am interested. I don't have a bunch of equipment. This is what I have:

    2620XM - WIC 2T
    2612 - WIC 2A/S
    2610 - WIC 2A/S

    3 x 2924 switches

    I also have a few old 10mb hubs and a couple dumb switches.
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  • mikej412mikej412 Member Posts: 10,086 ■■■■■■■■■■
    Catalyst Switched Port Analyzer (SPAN) Configuration Example

    Your 2900s should support SPAN, but not RSPAN.
    :mike: Cisco Certifications -- Collect the Entire Set!
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  • boostinbadgerboostinbadger Member Posts: 256
    Thanks. I set up port monitoring on my single 2924 at home. Now I don't need a hub, etc..just my router and switch. Now I just need to figure out how to set port monitoring on one switch to monitor two others.
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  • phreakphreak Member Posts: 170 ■■□□□□□□□□
    SPAN is a very useful feature on switches. I use it to debug our core once and a while.
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  • NetstudentNetstudent Member Posts: 1,693 ■■■□□□□□□□
    boostinbadger wrote:
    Thanks. I set up port monitoring on my single 2924 at home. Now I don't need a hub, etc..just my router and switch. Now I just need to figure out how to set port monitoring on one switch to monitor two others.

    As Mike stated, 2924's will not support RSPAN.
    There is no place like 127.0.0.1 BUT 209.62.5.3 is my 127.0.0.1 away from 127.0.0.1!
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  • boostinbadgerboostinbadger Member Posts: 256
    I see now what RSPAN means. I am getting ready to start the Switching portion of the Network Academy so I guess I will learn about all that then.
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