07-30-2008 07:27 AM - edited 03-06-2019 12:31 AM
Hi,
what means the following errors in debug ip packet output:
Mar 1 00:16:34.419: IP: s=0.0.0.0 (Vlan1), d=255.255.255.255, len 330, rcvd 2
*Mar 1 00:16:34.419: IP: s=0.0.0.0 (Vlan1), d=255.255.255.255, len 330, stop pr
ocess pak for forus packet
*Mar 1 00:16:34.419: IP: s=10.132.16.1 (local), d=10.132.1.16, len 330, local f
eature, Redirection Cli(6), rtype 0, forus FALSE, sendself FALSE, mtu 0
*Mar 1 00:16:34.419: IP: s=10.132.16.1 (local), d=10.132.1.16, len 330, local f
eature, Clustering(7), rtype 0, forus FALSE, sendself FALSE, mtu 0
*Mar 1 00:16:34.419: IP: tableid=0, s=10.132.16.1 (local), d=10.132.1.16 (Vlan1
0), routed via FIB
*Mar 1 00:16:34.419: IP: s=10.132.16.1 (local), d=10.132.1.16 (Vlan10), len 330
, sending
*Mar 1 00:16:34.419: IP: s=10.132.16.1 (local), d=10.132.1.16 (Vlan10), len 330
, output feature, Check hwidb(63), rtype 1, forus FALSE, sendself FALSE, mtu 0
*Mar 1 00:16:34.419: IP: s=10.132.16.1 (local), d=10.132.1.16 (Vlan10), len 330
, sending full packet
Thank you
Roman
Solved! Go to Solution.
07-30-2008 09:10 AM
Hello Roman,
I suppose you are using a multilayer switch.
I tried to look at command reference for debug ip packet in 12.2SX used in Cat6500.
I didn't find forus packet.
However, the first raw should be a DHCP request from a booting client if no ip helper-address pointing to a dhcp server is configured under vlan1 SVI the packet is discarded for its broadcast destination and this is correct behavior
the following lines are about a packet with source 10.132.16.1 with d= 10.132.1.16 and same size 330 byte as first discarded packet.
This packet is sent to 10.132.1.16.
I may be wrong but I think that you have ip helper-address under vlan1 pointing to ip 10.132.1.16 and that vlan1's ip address is 10.132.16.1
If so you are seeing the switch activity when receiving a dhcp request :
original packet is discarded
a modified version as per ip helper-address is routed to vlan10:
*Mar 1 00:16:34.419: IP: s=10.132.16.1 (local), d=10.132.1.16 (Vlan10), len 330
, sending full packet
Hope to help
Giuseppe
07-30-2008 09:10 AM
Hello Roman,
I suppose you are using a multilayer switch.
I tried to look at command reference for debug ip packet in 12.2SX used in Cat6500.
I didn't find forus packet.
However, the first raw should be a DHCP request from a booting client if no ip helper-address pointing to a dhcp server is configured under vlan1 SVI the packet is discarded for its broadcast destination and this is correct behavior
the following lines are about a packet with source 10.132.16.1 with d= 10.132.1.16 and same size 330 byte as first discarded packet.
This packet is sent to 10.132.1.16.
I may be wrong but I think that you have ip helper-address under vlan1 pointing to ip 10.132.1.16 and that vlan1's ip address is 10.132.16.1
If so you are seeing the switch activity when receiving a dhcp request :
original packet is discarded
a modified version as per ip helper-address is routed to vlan10:
*Mar 1 00:16:34.419: IP: s=10.132.16.1 (local), d=10.132.1.16 (Vlan10), len 330
, sending full packet
Hope to help
Giuseppe
07-31-2008 01:47 AM
Thank you for your explanation. It was help me. Roman
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