R3303-HP HSR6800 Routers Network Management and Monitoring Configuration Guide

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To configure MPLS-aware NetStream:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Count and export
statistics on MPLS
packets.
ip netstream mpls [ label-positions
{ label-position1 [ label-position2 ]
[ label-position3 ] } ] [ no-ip-fields ]
By default, no statistics about MPLS
packets are counted and exported.
The command of ip netstream mpls
[ label-positions { label-position1
[ label-position2 ]
[ label-position3 ] } ] [ no-ip-fields ]
enables both IPv4 and IPv6
NetStream of MPLS packets.
Configuring NetStream flow aging
Flow aging methods
The following types of NetStream flow aging are available:
• Periodical aging
• Forced aging
• TCP FIN- and RST-triggered aging (a
utomatically triggered if a TCP connection is terminated)
Periodical aging
Periodical aging uses the following methods:
• Inactive flow aging—A flow is considered inactive if its statistics have not been changed, that is, no
packet for this NetStream entry arrives in the time specified by the ip netstream timeout inactive
command. The inactive flow entry remains in the cache until the inactive timer expires. Then the
inactive flow is aged out and its statistics, which can no longer be displayed by the display ip
netstream cache command, are sent to the NetStream server. The inactive flow aging makes sure
that the cache is big enough for new flow entries.
• Active flow aging—An active flow is aged out when the time specified by the ip netstream timeout
active command is reached, and its statistics are exported to the NetStream server. The device
continues to count the active flow statistics, which can be displayed by the display ip netstream
cache command. The active flow aging exports the statistics of active flows to the NetStream server.
Forced aging
Use the reset ip netstream statistics command to age out all NetStream entries in the cache and to clear
the statistics. This is forced aging. Alternatively, use the ip netstream max-entry command to configure
aging out of entries in the cache when the maximum number of entries is reached.
TCP FIN- and RST-triggered aging
For a TCP connection, when a packet with a FIN or RST flag is sent out, it means that a session is finished.
If a packet with a FIN or RST flag is recorded for a flow with the NetStream entry already created, the
flow is aged out immediately. However, if the packet with a FIN or RST flag is the first packet of a flow,
a new NetStream entry is created instead of being aged out.