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6509 Sup720 Netflow export problem ?

Hello Colelagues.

I have strange problem with new 6509 with two Sup720 and Netflow export.

I have config like this:

interface GigabitEthernet5/2

no ip address

ip route-cache policy

ip route-cache flow

media-type rj45

no cdp enable


interface GigabitEthernet5/2.1

encapsulation dot1Q 321

ip address

no cdp enable


ip flow-export source GigabitEthernet5/2.1

ip flow-export version 5 origin-as

ip flow-export destination 2055

And I'm trying to capture flow export packets with no success. When switch export udp packet to my FreeBsd box it tagging packet with double vlan 312 tag.

This is the tcpdump output on main interface:

bash-2.05# tcpdump -tvni fxp1

tcpdump: WARNING: fxp1: no IPv4 address assigned

tcpdump: listening on fxp1

802.1Q vlan#321 P0 802.1Q vlan#321 P0 > udp 120 (ttl 255, id 15521, len 148)

At the same time other traffic like imcp,tcp is tagged correctly. Even traceroute from switch works well.

Software version:

Cisco Internetwork Operating System Software

IOS (tm) s72033_rp Software (s72033_rp-PK9SV-M), Version 12.2(14)SX, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

Anybody have any ideas about this stange behaviour??

Thank you for advance.


Re: 6509 Sup720 Netflow export problem ?

Guess, you can disable the vlan tagging and then re-enable it again.

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