Sflow Support For Ipv6 Packets - Brocade Communications Systems FastIron Administration Manual

sFlow support for IPv6 packets

• sFlow version 5 datagrams
• Sub-agent support
• Configurable sFlow export packet size
• Support for the new data field and sample type length in flow samples
• Configurable interval for exporting Brocade-specific data structure
sFlow version 5 is backward-compatible with sFlow version 2. By default, the sFlow agent exports
sFlow version 5 flow samples by default, but you can configure the device to export the data in sFlow
version 2 format. You can switch between sFlow version 2 and sFlow version 5 formats. The sFlow
collector automatically parses each incoming sample and decodes it based on the version number.
The configuration procedures for sFlow version 5 are the same as for sFlow version 2, except where
explicitly noted. Configuration procedures for sFlow are in the section
on page 249. The features and CLI commands that are specific to sFlow version 5 are described in
the section
sFlow support for IPv6 packets
The Brocade implementation of sFlow features support IPv6 packets. This support includes extended
router information and extended gateway information in the sampled packet. Note that sFlow support
for IPv6 packets exists only on devices running software that supports IPv6.
The configuration procedures for this feature are the same as for IPv4, except where the collector is a
link-local address on a Layer 3 switch. For details refer to
Extended router information
IPv6 sFlow sampled packets include the following extended router information:
• IP address of the next hop router
• Outgoing VLAN ID
• Source IP address prefix length
• Destination IP address prefix length
Note that in IPv6 devices, the prefix lengths of the source and destination IP addresses are collected if
BGP is configured and the route lookup is completed. In IPv4 devices, this information is collected only
if BGP is configured on the devices.
Extended gateway information
If BGP is enabled, extended gateway information is included in IPv6 sFlow sampled packets, including
the following BGP information about a packet destination route:
• The Autonomous System number for the router
• The source IP Autonomous System of the route
• The source peer Autonomous System for the route
• The Autonomous System patch to the destination
NOTE
Autonomous System communities and local preferences are not included in the sampled packets.
To obtain extended gateway information, use "struct extended_gateway" as described in RFC 3176.
246
sFlow version 5 feature configuration
Configuring and enabling sFlow
on page 256.
Specifying the collector
FastIron Ethernet Switch Administration Guide
on page 250.
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