Huawei AR150 series - Creating Static PMTU Entries; Configuring PMTU Aging Time

Applicable Environment
By setting PMTUs on interfaces, you can enable devices to send packets based on proper MTUs
across the network. This avoids packet fragmentation, reduces the burden of the devices,
implements efficient usage of network resources and achieves the best throughput.
Pre-configuration Tasks
Before configuring PMTUs, complete the following tasks:
l Configuring the physical features for the interface and ensuring that the status of the
physical layer of the interface is Up
l Configuring the link layer protocol for the interface
Data Preparation
To configure PMTUs, you need the following data.
No. Data
1 IPv6 address and PMTU value to be configured
2 PMTU aging time
3.6.2 Creating Static PMTU Entries
You can configure a static PMTU according to the lowest MTU of the path that a packet is to
traverse. This speeds up packet transmission.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
ipv6 pathmtu ipv6-address [ path-mtu ]
The PMTU value of a specified IPv6 address is configured.
By default, the PMTU of the IPv6 address is 1500 bytes.
l The maximum number of static PMTU entries is 300.
l The maximum number of dynamic and static PMTU entries on the public network is 512 for
the AR200 or AR1200, and 1024 for the AR2200 or AR3200.
----End
3.6.3 Configuring PMTU Aging Time
By setting the PMTU aging time, you can change the keepalive time of dynamic PMTU entries
in the cache. A static PMTU entry never ages.
Huawei AR150&200 Series Enterprise Routers
Configuration Guide - IP Service 3 Basic IPv6 Configuration
Issue 02 (2012-03-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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