rstp代码的实现及注释

alex alex ~/Stp.emu>./bridge my pid: 5056 12:53:09:clearFDB (all, start stpm) 12:53:09 B5056 > ? List of possible commands: enable enable rstp disbale disbale rstp get-br-cfg get bridge config get-port-cfg get port config set-br-prio set bridge priority set-br-maxage set bridge max. age set-br-fdelay set bridge forward delay set-br-force-version set bridge force version set-prt-prio set port priority set-prt-pcost set port path cost set-prt-p2p set port admin 'Point To Point' set-prt-edge set port admin edge set-trace set trace 'standard' commands: quit 'shutdown' bridge alias 'ex' (from 'exit') ? help alias 'h' (from 'help') 12:53:23 B5056 > set-trace 2 all disable port p02 tag 0 pcost (was disabled) now disabled port p02 tag 0 edge (was disabled) now disabled port p02 tag 0 p2p (was disabled) now disabled port p02 tag 0 transmit (was disabled) now disabled port p02 tag 0 migrate (was disabled) now disabled port p02 tag 0 topoch (was disabled) now disabled port p02 tag 0 sttrans (was disabled) now disabled port p02 tag 0 roletrns (was disabled) now disabled port p02 tag 0 info (was disabled) now disabled 12:53:39 B5056 > set-trace 2 edge enable port p02 tag 0 edge (was disabled) now enabled 12:54:38 B5056 > set-trace 2 topoch enable port p02 tag 0 topoch (was disabled) now enabled 12:54:57 B5056 > set-trace 2 roletrns enable port p02 tag 0 roletrns (was disabled) now enabled 12:55:14 B5056 > help get-st-p get-port-cfg: get port config ----------------------------- (possible short name: 'get-st-p') arguments: ---------- arg: port index; default 'all ports' 12:55:57 B5056 > get-st-pcfg E p01 8001 Dis 8000-00c013000001 8000-00c013000001 8001 E p02 8002 Dis 8000-00c013000001 8000-00c013000001 8002 E p03 8003 Dis 8000-00c013000001 8000-00c013000001 8003 E p04 8004 Dis 8000-00c013000001 8000-00c013000001 8004 12:56:19 B5056 > 12:56:19 B5056 > get-st-p 2 Stp Port p02: PortId: 8002 in Bridge 'B5056': Priority: 128 State: Disabled PathCost: 20000 Designated Root: 8000-00c013000001 Designated Cost: 0 Designated Bridge: 8000-00c013000001 Designated Port: 8002 Flags: operEdge RSTP BPDU rx: 0 CONFIG BPDU rx: 0 TCN BPDU rx: 0 12:56:46 B5056 > connected port p02 12:57:16:Port p02 became 'enable' adminEdge=Y 12:57:16 B5056 > 12:57:16:edge(B5056-p02): DISABLED=>DETECTED 12:57:16:edge(B5056-p02): DETECTED=>DELEAYED 12:57:16:Age-B5056:port p02 => Designated 12:57:16:roletrns(B5056-p02): DESIGNATED_PORT=>DESIGNATED_PROPOSE 12:57:16:roletrns(B5056-p02): DESIGNATED_PORT=>DESIGNATED_SYNCED 12:57:16:topoch(B5056-p02): INACTIVE=>TCACTIVE 12:57:16:port p02 'edge' resolved by BPDU incame 12:57:16:edge(B5056-p02): DELEAYED=>RESOLVED 12:57:16:brige 0 root port became p02 12:57:16:Rec-B5056:port p02 => Root 12:57:16:roletrns(B5056-p02): DESIGNATED_PORT=>ROOT_PORT 12:57:16:roletrns(B5056-p02): ROOT_PORT=>REROOT 12:57:16:roletrns(B5056-p02): REROOT=>ROOT_PORT 12:57:16:roletrns(B5056-p02): ROOT_PORT=>ROOT_AGREED 12:57:16:roletrns(B5056-p02): ROOT_AGREED=>ROOT_PORT 12:57:16:roletrns(B5056-p02): ROOT_PORT=>ROOT_LEARN 12:57:16:roletrns(B5056-p02): ROOT_LEARN=>ROOT_PORT 12:57:16:roletrns(B5056-p02): ROOT_PORT=>ROOT_FORWARD 12:57:16:roletrns(B5056-p02): ROOT_FORWARD=>ROOT_PORT 12:57:16:roletrns(B5056-p02): ROOT_PORT=>REROOTED 12:57:16:roletrns(B5056-p02): REROOTED=>ROOT_PORT 12:57:16:topoch(B5056-p02): TCACTIVE=>DETECTED 12:57:16:clearFDB (2, 0, other ports, 'DETECTED') 12:57:16:topoch(B5056-p02): DETECTED=>TCACTIVE 12:57:18:port p02 rx rcvdTc 0X4d 12:57:18:topoch(B5056-p02): TCACTIVE=>NOTIFIED_TC 12:57:18:clearFDB (2, 0, other ports, 'NOTIFIED_TC') 12:57:18:topoch(B5056-p02): NOTIFIED_TC=>TCACTIVE 12:59:11 B5056 > get-st-p E p01 8001 Dis 8000-00bf13000001 8000-00c013000001 8001 p02 8002 Fwd 8000-00bf13000001 8000-00bf13000001 8002 R E p03 8003 Dis 8000-00bf13000001 8000-00c013000001 8003 E p04 8004 Dis 8000-00bf13000001 8000-00c013000001 8004 12:59:15 B5056 > 12:59:15 B5056 > set-br-prio 0x400 STP_rolesel_force 12:59:59:brige 0 became root 12:59:59:rec-B5056:port p02 => Backup Changed rstp bridge priority 12:59:59 B5056 > 12:59:59:rec-B5056:port p02 => Backup 12:59:59:roletrns(B5056-p02): ROOT_PORT=>BLOCK_PORT 12:59:59:topoch(B5056-p02): TCACTIVE=>INIT 12:59:59:topoch(B5056-p02): INIT=>INACTIVE 12:59:59:roletrns(B5056-p02): BLOCK_PORT=>BLOCKED_PORT 12:59:59:roletrns(B5056-p02): BLOCKED_PORT=>BACKUP_PORT 12:59:59:roletrns(B5056-p02): BACKUP_PORT=>BLOCKED_PORT 13:00:00:roletrns(B5056-p02): BLOCKED_PORT=>BACKUP_PORT 13:00:00:roletrns(B5056-p02): BACKUP_PORT=>BLOCKED_PORT 13:00:01:roletrns(B5056-p02): BLOCKED_PORT=>BACKUP_PORT 13:00:01:roletrns(B5056-p02): BACKUP_PORT=>BLOCKED_PORT 13:00:02:roletrns(B5056-p02): BLOCKED_PORT=>BACKUP_PORT 13:00:02:roletrns(B5056-p02): BACKUP_PORT=>BLOCKED_PORT 13:00:03:roletrns(B5056-p02): BLOCKED_PORT=>BACKUP_PORT 13:00:03:roletrns(B5056-p02): BACKUP_PORT=>BLOCKED_PORT 13:00:03:Age-B5056:port p02 => Designated 13:00:03:roletrns(B5056-p02): DESIGNATED_PORT=>DESIGNATED_PROPOSE 13:00:03:roletrns(B5056-p02): DESIGNATED_PORT=>DESIGNATED_SYNCED 13:00:03:topoch(B5056-p02): INACTIVE=>TCACTIVE 13:00:03:!AGREEMENT! on port p02 13:00:03:roletrns(B5056-p02): DESIGNATED_PORT=>DESIGNATED_LEARN 13:00:03:roletrns(B5056-p02): DESIGNATED_PORT=>DESIGNATED_FORWARD 13:00:03:topoch(B5056-p02): TCACTIVE=>DETECTED 13:00:03:clearFDB (2, 0, other ports, 'DETECTED') 13:00:03:topoch(B5056-p02): DETECTED=>TCACTIVE get-st-p E p01 8001 Dis 0400-00c013000001 0400-00c013000001 8001 p02 8002 Fwd 0400-00c013000001 0400-00c013000001 8002 D E p03 8003 Dis 0400-00c013000001 0400-00c013000001 8003 E p04 8004 Dis 0400-00c013000001 0400-00c013000001 8004 13:00:29 B5056 > 13:02:47 B5056 > quit alex alex ~/Stp.emu>