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Diffstat (limited to 'README')
| -rw-r--r-- | README | 18 |
1 files changed, 18 insertions, 0 deletions
@@ -2037,6 +2037,24 @@ CBFS (Coreboot Filesystem) support 4th and following BOOTP requests: delay 0 ... 8 sec + CONFIG_BOOTP_ID_CACHE_SIZE + + BOOTP packets are uniquely identified using a 32-bit ID. The + server will copy the ID from client requests to responses and + U-Boot will use this to determine if it is the destination of + an incoming response. Some servers will check that addresses + aren't in use before handing them out (usually using an ARP + ping) and therefore take up to a few hundred milliseconds to + respond. Network congestion may also influence the time it + takes for a response to make it back to the client. If that + time is too long, U-Boot will retransmit requests. In order + to allow earlier responses to still be accepted after these + retransmissions, U-Boot's BOOTP client keeps a small cache of + IDs. The CONFIG_BOOTP_ID_CACHE_SIZE controls the size of this + cache. The default is to keep IDs for up to four outstanding + requests. Increasing this will allow U-Boot to accept offers + from a BOOTP client in networks with unusually high latency. + - DHCP Advanced Options: You can fine tune the DHCP functionality by defining CONFIG_BOOTP_* symbols: |