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BigIron RX Series Configuration Guide
53-1001810-01
Filtering specific IP addresses
26
NOTE
Once you define a filter, the default action for addresses that do not match a filter is “deny”. To
change the default action to “permit”, configure the last filter as “permit any any”.
Address filters can be referred to by a BGP neighbor's distribute list number as well as by match
statements in a route map.
NOTE
If the filter is referred to by a route map’s match statement, the filter is applied in the order in which
the filter is listed in the match statement.
NOTE
You also can filter on IP addresses by using IP ACLs. See “Software-Based IP Access Control Lists
(ACLs)”.
To define an IP address filter to deny routes to 209.157.0.0, enter the following command.
BigIron RX(config-bgp)# address-filter 1 deny 209.157.0.0 255.255.0.0
Syntax: [no] address-filter
<num>
permit | deny
<ip-addr>
<wildcard> <mask>
<wildcard>
The
<num>
parameter is the filter number.
The permit | deny parameter indicates the action the device takes if the filter match is true.
•
If you specify permit, the BigIron RX permits the route into the BGP4 table if the filter match is
true.
•
If you specify deny, the BigIron RX denies the route from entering the BGP4 table if the filter
match is true.
NOTE
Once you define a filter, the default action for addresses that do not match a filter is “deny”. To
change the default action to “permit”, configure the last filter as “permit any any”.
The
<ip-addr>
parameter specifies the IP address. If you want the filter to match on all addresses,
enter any.
The
<wildcard>
parameter specifies the portion of the IP address to match against. The
<wildcard>
is a four-part value in dotted-decimal notation (IP address format) consisting of ones and zeros.
Zeros in the mask mean the packet’s source address must match the
<source-ip>
. Ones mean any
value matches. For example, the
<ip-addr>
and
<wildcard>
values 209.157.22.26 0.0.0.255 mean that all hosts in the Class C
subnet 209.157.22.x match the policy.
If you prefer to specify the wildcard (mask value) in Classless Interdomain Routing (CIDR) format,
you can enter a forward slash after the IP address, then enter the number of significant bits in the
mask. For example, you can enter the CIDR equivalent of “209.157.22.26 0.0.0.255” as
“209.157.22.26/24”. The CLI automatically converts the CIDR number into the appropriate mask
(where zeros instead of ones are the significant bits) and changes the non-significant portion of the
IP address into zeros. For example, if you specify 209.157.22.26/24 or 209.157.22.26 0.0.0.255,
then save the changes to the startup configuration file, the value appears as 209.157.22.0/24 (if
you have enabled display of subnet lengths) or 209.157.22.0 0.0.0.255 in the startup
configuration file.
Summary of Contents for Brocade DCX
Page 40: ...xl BigIron RX Series Configuration Guide 53 1001810 01 ...
Page 72: ...lxxii BigIron RX Series Configuration Guide 53 1001810 01 ...
Page 88: ...16 BigIron RX Series Configuration Guide 53 1001810 01 Searching and filtering output 1 ...
Page 300: ...228 BigIron RX Series Configuration Guide 53 1001810 01 Displaying IP information 7 ...
Page 318: ...246 BigIron RX Series Configuration Guide 53 1001810 01 Deploying a LAG 8 ...
Page 418: ...346 BigIron RX Series Configuration Guide 53 1001810 01 SuperSpan 12 ...
Page 482: ...410 BigIron RX Series Configuration Guide 53 1001810 01 MRP CLI example 14 ...
Page 506: ...434 BigIron RX Series Configuration Guide 53 1001810 01 Displaying VSRP information 15 ...
Page 582: ...510 BigIron RX Series Configuration Guide 53 1001810 01 Viewing Layer 2 ACLs 20 ...
Page 634: ...562 BigIron RX Series Configuration Guide 53 1001810 01 Troubleshooting ACLs 21 ...
Page 642: ...570 BigIron RX Series Configuration Guide 53 1001810 01 Trunk formation 22 ...
Page 746: ...674 BigIron RX Series Configuration Guide 53 1001810 01 Displaying RIP filters 24 ...
Page 808: ...736 BigIron RX Series Configuration Guide 53 1001810 01 Displaying OSPF information 25 ...
Page 938: ...866 BigIron RX Series Configuration Guide 53 1001810 01 Displaying MBGP information 27 ...
Page 950: ...878 BigIron RX Series Configuration Guide 53 1001810 01 Using secure copy 28 ...
Page 988: ...916 BigIron RX Series Configuration Guide 53 1001810 01 Clearing IS IS information 29 ...
Page 1054: ...982 BigIron RX Series Configuration Guide 53 1001810 01 Sample 802 1x configurations 33 ...
Page 1108: ...1036 BigIron RX Series Configuration Guide 53 1001810 01 sFlow 39 ...
Page 1190: ...1118 BigIron RX Series Configuration Guide 53 1001810 01 Displaying RIPng information 44 ...
Page 1270: ...1198 BigIron RX Series Configuration Guide 53 1001810 01 Displaying ACLs 47 ...
Page 1310: ...1238 BigIron RX Series Configuration Guide 53 1001810 01 Displaying OSPFv3 information 48 ...
Page 1382: ...1310 BigIron RX Series Configuration Guide 53 1001810 01 Commands That Require a Reload D ...
Page 1435: ...BigIron RX Series Configuration Guide 1363 53 1001810 01 VSRP E ...
Page 1436: ...1364 BigIron RX Series Configuration Guide 53 1001810 01 VSRP E ...