Reference Guide
distance
Define the administrative distance for learned routes.
S4820T
Syntax
distance weight [ip-address mask [prefix-list]]
To return to the default values, use the no distance weight command.
Parameters
weight
The administrative distance value indicates the reliability of a routing 
information source. The range is from 1 to 255. (A higher relative 
value indicates lower reliability. Routes with smaller values are given 
preference.) The default is 115.
ip-address mask
(OPTIONAL) Enter an IP address in dotted decimal format and enter a 
mask in either dotted decimal or /prefix format.
prefix-list
(OPTIONAL) Enter the name of a prefix list name.
Defaults weight = 115
Command Modes
• ROUTER ISIS (
for IPv4
)
• CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (
for IPv6
)
Command History
This guide is platform-specific. For command information about other platforms, refer to the 
relevant 
FTOS Command Line Reference Guide
.
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 8.3.11.1 Introduced on the Z9000.
Version 6.3.1.0 Introduced.
Usage 
Information
The administrative distance indicates the trust value of incoming packets. A low administrative 
distance indicates a high trust rate. A high value indicates a lower trust rate. For example, a 
weight of 255 is interpreted that the routing information source is not trustworthy and should be 
ignored.
distribute-list in
Filter network prefixes received in updates.
S4820T
Syntax
distribute-list prefix-list-name in [interface]
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