Cisco Cisco IOS Software Release 12.2(27)SBC
MPLS-Aware NetFlow
Prerequisites for MPLS-Aware NetFlow
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Cisco IOS Release: Multiple releases (see Feature Information table)
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Prerequisites for MPLS-Aware NetFlow
The MPLS-Aware NetFlow feature requires the following for its operation:
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NetFlow configured on the label switch router (LSR)
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MPLS enabled on the LSR
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Cisco Express Forwarding or distributed Cisco Express Forwarding enabled on the LSR
The following are also required if you are exporting MPLS-Aware NetFlow data to a Cisco NetFlow
collector:
collector:
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NetFlow Version 9 export format configured on the LSR
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NetFlow collector and analyzer capable of using MPLS-Aware NetFlow export packets in Version 9
format
format
Restrictions for MPLS-Aware NetFlow
The following restrictions apply to the MPLS-Aware NetFlow feature in Cisco IOS Releases 12.0(26)S,
12.3(8)T, 12.2(28)SB, and later releases:
12.3(8)T, 12.2(28)SB, and later releases:
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No more than three MPLS labels are allowed to be captured and exported for this implementation.
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MPLS-Aware NetFlow reports the following fields in MPLS flows as 0: IP next-hop, source and
destination Border Gateway Protocol (BGP) autonomous system numbers, and source and
destination prefix masks.
destination Border Gateway Protocol (BGP) autonomous system numbers, and source and
destination prefix masks.
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For MPLS packets that contain non-IP packets under the MPLS label stack, MPLS-Aware NetFlow
reports the following flow fields as 0: source and destination IP addresses, protocol, ToS, ports, and
TCP flags.
reports the following flow fields as 0: source and destination IP addresses, protocol, ToS, ports, and
TCP flags.
The following restriction applies to MPLS-Aware NetFlow in Cisco IOS Release 12.2(28)SB and later
releases:
releases:
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The MPLS label type and associated IP address are not captured. If you want this functionality, you
need to enable the NetFlow MPLS Label Export feature.
need to enable the NetFlow MPLS Label Export feature.
Information About MPLS-Aware NetFlow
The following sections contain information for understanding how to configure and use the
MPLS-Aware NetFlow feature:
MPLS-Aware NetFlow feature:
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