From: Douglas M Todd, Jr (dtodd@PARTNERS.ORG)
Date: Thu Jun 28 2007 - 11:26:39 ART
You are trying to get r2 to see ntp packets with out using the ntp
server option? while not enabling ntp on SW2, but just forwarding the
ntp broadcasts to R2?
DMT
kindy wrote:
> hi group,
>
> ip connect router diagram like that.i'm add "ip forward-protocol udp ntp" on
> SW2 f0/4
> but seem SW2 not forward udp broadcast to R2 what wrong ?
>
> i'm try to debug ntp packet on R4,its already send via broadcast
>
> R4#sh debugNTP: NTP packets debugging is on
> 1d02h: IP: s=192.168.24.4 (local), d=255.255.255.255 (FastEthernet0/0), len
> 76, sending broad/multicast1d02h: UDP src=123, dst=1231d02h: NTP: xmit
> packet to 255.255.255.255:1d02h: leap 0, mode 5, version 3, stratum 8, ppoll
> 641d02h: rtdel 0000 (0.000), rtdsp 0002 (0.031), refid 7F7F0701
> (127.127.7.1)1d02h: ref CA2E8C46.84A87DB8 (19:36:38.518 UTC Thu Jun 28
> 2007)1d02h: org 00000000.00000000 (00:00:00.000 UTC Mon Jan 1 1900)1d02h:
> rec 00000000.00000000 (00:00:00.000 UTC Mon Jan 1 1900)1d02h: xmt
> CA2E8C4C.84A876C8 (19:36:44.518 UTC Thu Jun 28 2007)
>
>
>
> R4(NTP server broadcast)---(f0/4)SW2(f0/2)---R2(NTP client)
>
> R2
> !interface FastEthernet0/0 ip address 192.168.22.2 255.255.255.0 duplex auto
> speed auto ntp broadcast client!
> ip route 0.0.0.0 0.0.0.0 192.168.22.8
>
>
> R4
> !interface FastEthernet0/0 ip address 192.168.24.4 255.255.255.0 duplex auto
> speed auto ntp broadcast!
> ip route 0.0.0.0 0.0.0.0 192.168.24.8
> ntp master
>
> SW2
> !
> !interface FastEthernet0/2 no switchport ip address 192.168.22.8 255.255.255.0
> ip directed-broadcast!!interface FastEthernet0/4 no switchport ip address
> 192.168.24.8 255.255.255.0 ip helper-address 192.168.22.255 ip
> directed-broadcast!
> ip routing
> ip forward-protocol udp ntp
> !
>
> Thank you
> kindy.
>
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