F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100

120
Hardware Feature com
p
atible
F1000-A-EI/F1000-S-EI No
F1000-E No
F5000 No
Firewall module No
U200-A No
U200-S Yes
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 eight 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.
HP recommends using this configuration option on low-speed links.
1. Configuring the local end to send PFC requests
Ste
p
Command Remarks
262. Enter system view.
system-view N/A
263. Enter interface view.
interface interface-type
interface-number
N/A
264. Configure the local end to send
PFC requests, that is, to include
the PFC option in its outbound
LCP negotiation requests.
ppp pfc local request
By default, the local end does not include
the PFC option in its outbound LCP
negotiation requests.
2. Configuring how the local end handles the PFC requests received from the peer
Ste
p
Command Remarks
265. Enter system view.
system-view N/A
266. Enter interface view.
interface interface-type interface-number N/A