HPE FlexNetwork MSR Series Comware 5 Layer 2 - Wan Access Configuration Manual page 26

payload bandwidth on the link. To ensure successful LCP negotiation, do not apply the compression
to LCP packets.
Hewlett Packard Enterprise recommends that you use the ACFC configuration option on low-speed
links.
•
Configuring the local end to send ACFC requests
Step
Enter system view.
1.
Enter interface view.
2.
Configure the local end to
3.
send ACFC requests, that
is, to include the ACFC
option in its outbound LCP
negotiation requests.
•
Configuring how the local end handles the ACFC requests received from the peer
Step
Enter system view.
1.
Enter interface view.
2.
Configure how the local
3.
end handles the ACFC
requests received from the
peer.
Configuring PFC negotiation
By default, the length of the protocol field in a PPP packet is 2 bytes. Because data protocols are
typically assigned protocol field values less than 256, the PPP protocol field can be compressed from
2 bytes to 1 byte to indicate protocol types.
PFC negotiation notifies the peer that the local end can receive the packets with single-byte protocol
fields.
PFC negotiation is implemented at the LCP negotiation stage. After PFC negotiation is completed,
the device compresses the protocol fields of non-LCP packets before sending them out. If the first 8
bits of the protocol field are all zeros, the device does not add them, thus increasing effective payload
bandwidth on the link. To ensure successful LCP negotiation, the compression does not apply to
LCP packets.
Hewlett Packard Enterprise recommends that you use this configuration option on low-speed links.
•
Configuring the local end to send PFC requests
Command
system-view
interface interface-type
interface-number
ppp acfc local request
Command
system-view
interface interface-type
interface-number
•
Configure the local end to
accept ACFC requests
received from the peer and
to perform ACFC on frames
sent to the peer:
ppp acfc remote apply
•
Configure the local end to
accept ACFC requests
received from the peer, but
not to perform ACFC on
frames sent to the peer:
ppp acfc remote ignore
•
Configure the local end to
reject ACFC requests sent
from the peer:
ppp acfc remote reject
15
Remarks
N/A
N/A
By default, the local end does
not include the ACFC option in
its outbound LCP negotiation
requests.
Remarks
N/A
N/A
Optional.
By default, the local end
accepts the ACFC requests
from the remote peer, but does
not perform ACFC on frames
sent to the peer.