Restrictions And Limitations For Frf.12 Fragmentation - Cisco 10000 Series Configuration Manual
Quality of service configuration guide
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Chapter 16
Fragmenting and Interleaving Real-Time and Nonreal-Time Packets
The Cisco 10000 series router does not require that you configure priority (low-latency) queuing to use
Note
interface-based fragmentation. However, the purpose of LFI is to reduce delay for priority traffic;
therefore, the benefit of LFI is realized when you do configure priority queuing. The class of
delay-sensitive traffic is mapped through a service policy to the priority queue.
Restrictions and Limitations for FRF.12 Fragmentation
PVC-Based Fragmentation
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Interface-Based Fragmentation
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OL-7433-09
Fragmentation is performed after frames are removed from the bundle.
The frame-relay route command does not support fragmentation.
The show frame-relay fragment command does not provide information about the number of
fragments received, dropped, and transmitted.
The show frame-relay fragment interface command does not provide information about the
number of:
Fragmented packets and bytes received
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Packets dropped while being reassembled
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Received packets in timeouts
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Interleaved packets transmitted
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Fragmented packets and bytes transmitted
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Fragmented packets dropped when transmitted
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We strongly recommend that you use only strict priority queues when configuring PVC-based
FRF.12 fragmentation. For more information, see
PVC-based and interface-based fragmentation cannot be configured at the same time.
The rate of the interface or subinterface must be between 64 and 2048 kbps.
Interface fragmentation and Frame Relay traffic shaping cannot be configured at the same time on
an interface. Do not configure the frame-relay traffic-shaping command on an interface with
Frame Relay interface fragmentation configured.
The frame-relay fair-dlci queuing command cannot be configured on an interface with Frame
Relay interface fragmentation configured. To specify QoS on FRF.12-enabled interfaces, use service
policies (see
Chapter 13, "Defining QoS for Multiple Policy
Local Management Interface (LMI) traffic is not fragmented.
We strongly recommend that you use only strict priority queues when configuring interface-based
FRF.12 fragmentation. For more information, see
Chapter 8, "Prioritizing Services."
Chapter 8, "Prioritizing Services."
Cisco 10000 Series Router Quality of Service Configuration Guide
FRF.12 Fragmentation
Levels.").
16-43
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