Figure 58 Executing An Ip Filter - Nortel BCM50a Configuration Manual

Figure 58 Executing an IP filter

Packet
into IP Filter
Filter Active?
Yes
Apply SrcAddrMask
to Src Addr
Check Src
IP Addr
Matched
Apply DestAddrMask
to Dest Addr
Check Dest
IP Addr
Matched
Check
IP Protocol
Matched
Check Src &
Dest Port
Matched
More?
No
Action Matched
Drop Forward
Drop Packet
No
Not Matched
Not Matched
Not Matched
Not Matched
Yes
Check Next Rule
Check Next Rule
Check Next Rule
BCM50a Integrated Router Configuration — Advanced
Chapter 11 Filter configuration 127
Action Not Matched
Drop Forward
Accept Packet