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Description
Use the link-protocol fr command to encapsulate interface link layer protocol as frame relay.
By default, the link-layer protocol encapsulated on the interface is PPP, and the frame relay encapsulation
format is IETF.
The frame relay encapsulation can be either ietf or nonstandard. IETF encapsulation conforms to RFC
1490, and it supports the IETF standard and is compatible with dedicated encapsulation format of
mainstream routers.
If you encapsulate a frame relay interface using any of these frame relay formats, the packets are
encapsulated in the frame relay format before they are forwarded through the interface. Two routers can
communicate with each other if the interfaces of both sides can recognize packets in both of the formats
even if they are encapsulated using different frame relay formats. If an interface on one side cannot
recognize packets of both formats, you need to encapsulate the two interfaces using the same frame
relay format.
CAUTION:
Before switching the link layer protocol of an interface (from PPP/HDLC to FR or the other way around),
manually remove all configurations related to QoS and ACL policies on the interface first.
Examples
# Configure frame relay encapsulation on interface Serial 4/1/8:10 and select the nonstandard
encapsulation compatible format.
<Sysname> system-view
[Sysname] interface Serial 4/1/8:10
[Sysname-Serial4/1/8:10] link-protocol fr nonstandard
reset fr inarp
Syntax
reset fr inarp
View
User view
Default level
2: System level
Parameters
None
Description
Use the reset fr inarp command to clear the address mapping established by inverse ARP.
In some special cases, for example, when the network architecture changes, the dynamic address maps
originally established will become invalid. It is necessary to establish them again. Users can use this
command to clear all the dynamic address maps.
Related commands: fr inarp.
Examples
# Clear all the frame relay dynamic address maps.
80
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