H3C Technologies H3C SR8800 - Manual (Page 172)

160
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure to 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.
NOTE:
•
Collection of NetStream MPLS packet statistics is supported only when NetStream is enabled.
• To collect statistics about MPLS packets carrying IPv4 data, enable IPv4 NetStream.
• To collect statistics about MPLS packets carrying IPv6 data, enable IPv6 NetStream.
• To collect statistics about MPLS packets carrying neither IPv4 nor IPv6 data, enable IPv4 NetStream.
• On a NAM card, to collect statistics about MPLS packets carrying non-IPv4 data, enable IPv4
NetStream. Only the statistics about labels are collected.
Configuring IPv6 NetStream flow aging
Flow aging approaches
Three types of IPv6 NetStream flow aging are available:
• Periodical aging
• Forced aging
• TCP FIN- and RST-triggered aging (it is automatically triggered when a TCP connection is
terminated)
Periodical aging
Periodical aging uses two approaches:
• Inactive flow aging
A flow is considered inactive if its statistics have not been changed. No packet for this IPv6
NetStream entry arrives in the time specified by the ipv6 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 ipv6 netstream cache
command, are sent to the NetStream server. The inactive flow aging guarantees the cache is big
enough for new flow entries.
• Active flow aging
An active flow is aged out when the time specified by the ipv6 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 ipv6 netstream cache command.
The active flow aging exports the statistics of active flows to the NetStream server.
Forced aging
The reset ipv6 netstream statistics command ages out all IPv6 NetStream entries in the cache and clears
the statistics. This is forced aging. Alternatively, use the ipv6 netstream max-entry command to configure
aging out of entries in the cache when the maximum number of entries is reached.