Cisco Systems BC-109 manual NetBIOS Access Filters Example

NetBIOS Access Filters Example

The show lnm config command displays the logical configuration of this bridge, including all the pertinent information for configuring this router into LNM:

Wayfarer# show lnm config

Bridge(s) currently configured:

From	ring	001, address 0000.0028.abcd
Across bridge		001
To	ring	008, address 4000.0028.abcd
From	ring	002, address 0000.3000.abc4
Across bridge		002
To	ring	008, address 4000.3000.abc4
From	ring	003, address 0000.3000.5735
Across bridge		003
To	ring	008, address 4000.3000.5735

In this example, six station definitions must be entered at the LNM Station, one for each of the MAC addresses listed in this sample show lnm config display.

NetBIOS Access Filters Example

The following command permits packets that include the station name ABCD to pass through the router, but denies passage to packets that do not include the station name ABCD:

netbios access-list host marketing permit ABCD

The following command specifies a prefix where the pattern matches any name beginning with the characters DEFG. Note that the string DEFG itself is included in this condition.

netbios access-list host marketing deny DEFG*

The following command permits any station name with the letter W as the first character and the letter Y as the third character in the name. The second and fourth letters in the name can be any character. This example would allow stations named WXYZ and WAYB; however, stations named WY and WXY would not be included in this statement, because the question mark must match some specific character in the name.

netbios access-list host marketing permit W?Y?

The following command illustrates how to combine wildcard characters:

netbios access-list host marketing deny AC?*

The command specifies that the marketing list deny any name beginning with AC that is at least three characters in length (the question mark would match any third character). The string ACBD and ACB would match, but the string AC would not.

The following command removes the entire marketing NetBIOS access list.

no netbios access-list host marketing

To remove single entries from the list, use a command such as the following:

no netbios access-list host marketing deny AC?*

This example removes only the list that filters station names with the letters AC at the beginning of the name.

Configuring Source-Route Bridging BC-159