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Configuring a Routing Policy

All routing protocols use the JUNOS Software routing table to store the routes that they learn and to determine which routes are advertised in the protocol packets. Routing policy allows you to control which routes the routing protocols store in and retrieve from the routing table on the routing device.

To configure routing policies in the J-Web interface:

Select Configure > Routing > Policies.
Click one:
- Global Options—Configures global options for policies. Enter information into the configuration page as described in Table 113.
- Add—Configures a new policy. Select New and specify a policy name. To add terms, enter information into the configuration page as described in Table 114. Select Clone to create a copy of an existing policy.
- Edit—Edits an existing policy. To modify an existing term, enter information into the configuration page as described in Table 114.
- Term Up—Moves a term up in the list.
- Term Down—Moves a term down in the list.
- Delete—Deletes the selected policy.
- Test Policy—Tests the policy. Use this option to check whether the policy produces the results that you expect.

Table 113: Policies Global Configuration Parameters

Field	Function	Your Action
Prefix List	Specifies a list of IPv4 address prefixes for use in a routing policy statement.	To add a prefix list: Click Add. Enter a name for the prefix list. To add an IP address, click Add. Enter the IP address and the subnet mask and click OK. Click OK. To edit a prefix list, click Edit. Edit the settings and click OK. To delete a prefix list, select it and click Delete.
BGP Community	Specifies a BGP community.	To add a BGP community: Click Add. Enter a name for the community. To add a community, click Add. Enter the community ID and click OK. Click OK. To edit a BGP community, click Edit. Edit the settings and click OK. To delete a BGP community, select it and click Delete.
AS Path	Specifies an AS path. This is applicable to BGP only.	To add an AS path: Click Add. Enter the AS path name. Enter the regular expression and click OK. Click OK. To edit an AS path, click Edit. Edit the settings and click OK. To delete an AS path, select it and click Delete.

Field

Function

Your Action

Prefix List

Specifies a list of IPv4 address prefixes for use in a routing policy statement.

To add a prefix list:

Click Add.
Enter a name for the prefix list.
To add an IP address, click Add.
Enter the IP address and the subnet mask and click OK.
Click OK.

To edit a prefix list, click Edit. Edit the settings and click OK.

To delete a prefix list, select it and click Delete.

BGP Community

Specifies a BGP community.

To add a BGP community:

Click Add.
Enter a name for the community.
To add a community, click Add.
Enter the community ID and click OK.
Click OK.

To edit a BGP community, click Edit. Edit the settings and click OK.

To delete a BGP community, select it and click Delete.

AS Path

Specifies an AS path. This is applicable to BGP only.

To add an AS path:

Click Add.
Enter the AS path name.
Enter the regular expression and click OK.
Click OK.

To edit an AS path, click Edit. Edit the settings and click OK.

To delete an AS path, select it and click Delete.

Table 114: Terms Configuration Parameters

Field	Function	Your Action
Term Name	Specifies a term name.	Type or select and edit the name.
Source tab
Family	Specifies an address family protocol.	Select a value from the list.
Routing Instance	Specifies a routing instance.	Select a value from the list.
RIB	Specifies the name of a routing table.	Select a value from the list
Preference	Specifies the individual preference value for the route.	Type or select and edit the value.
Metric	Specifies a metric value. You can specify up to four metric values.	Type or select and edit the value.
Interface	Specifies a name or IP address of one or more routing device interfaces. Do not use this qualifier with protocols that are not interface-specific, such as internal BGP (IBGP).	To add an interface, select Add > Interface. Select the interface from the list. To add an address, select Add > Address. Select the address from the list. To remove an interface, select it and click Remove.
Prefix List	Specifies a named list of IP addresses. You can specify an exact match with incoming routes.	Click Add. Select the prefix list from the list and click OK. To remove a prefix list, select it and click Remove.
Protocol	Specifies the name of the protocol from which the route was learned or to which the route is being advertised.	Click Add and select the protocol from the list. To remove a protocol, select it and click Remove.
Policy	Specifies the name of a policy to evaluate as a subroutine.	Click Add. Select the policy from the list. To remove a policy, select it and click Remove.
More	Specifies advanced configuration options for policies.	Click More for advanced configuration.
OSPF Area ID	Specifies the area identifier.	Type the IP address.
BGP Origin	Specifies the origin of the AS path information.	Select a value from the list.
Local Preference	Specifies the BGP local preference.	Type a value.
Route	Specifies the type of route.	Select External. Select the OSPF type from the list.
AS Path	Specifies the name of an AS path regular expression.	Click Add. Select the AS path from the list.
Community	Specifies the name of one or more communities.	Click Add. Select the community from the list.
Destination tab
Family	Specifies an address family protocol.	Select a value from the list.
Routing Instance	Specifies a routing instance.	Select a value from the list.
RIB	Specifies the name of a routing table.	Select a value from the list.
Preference	Specifies the individual preference value for the route.	Type a value.
Metric	Specifies a metric value.	Type a value.
Interface	Specifies a name or IP address of one or more routing device interfaces. Do not use this qualifier with protocols that are not interface-specific, such as internal BGP (IBGP).	To add an interface, select Add > Interface. Select the interface from the list. To add an address, select Add > Address. Select the address from the list. To delete an interface, select it and click Remove.
Protocol	Specifies the name of the protocol from which the route was learned or to which the route is being advertised.	Click Add and select the protocol from the list. To delete a protocol, select it and click Remove.
Action tab
Action	Specifies the action to take if the conditions match.	Select a value from the list.
Default Action	Specifies that any action that is intrinsic to the protocol is overridden. This action is also nonterminating, so that various policy terms can be evaluated before the policy is terminated.	Select a value from the list.
Next	Specifies the default control action if a match occurs, and there are no further terms in the current routing policy.	Select a value from the list.
Priority	Specifies a priority for prefixes included in an OSPF import policy. Prefixes learned through OSPF are installed in the routing table based on the priority assigned to the prefixes.	Select a value from the list.
BGP Origin	Specifies the BGP origin attribute.	Select a value from the list.
AS Path Prepend	Affixes an AS number at the beginning of the AS path. The AS numbers are added after the local AS number has been added to the path. This action adds an AS number to AS sequences only, not to AS sets. If the existing AS path begins with a confederation sequence or set, the affixed AS number is placed within a confederation sequence. Otherwise, the affixed AS number is placed with a nonconfederation sequence.	Enter a value.
AS Path Expand	Extracts the last AS number in the existing AS path and affixes that AS number to the beginning of the AS path n times, where n is a number from 1 through 32. The AS number is added before the local AS number has been added to the path. This action adds AS numbers to AS sequences only, not to AS sets. If the existing AS path begins with a confederation sequence or set, the affixed AS numbers are placed within a confederation sequence. Otherwise, the affixed AS numbers are placed within a nonconfederation sequence. This option is typically used in non-IBGP export policies.	Select the type and type a value.
Load Balance Per Packet	Specifies that all next-hop addresses in the forwarding table must be installed and have the forwarding table perform per-packet load balancing. This policy action allows you to optimize VPLS traffic flows across multiple paths.	Select the check box to enable the option.
Tag	Specifies the tag value. The tag action sets the 32-bit tag field in OSPF external link-state advertisement (LSA) packets.	Select the action and type a value.
Metric	Changes the metric (MED) value by the specified negative or positive offset. This action is useful only in an external BGP (EBGP) export policy.	Select the action and type a value.
Route	Specifies whether the route is external.	Select the External check box to enable the option, and select the OSPF type.
Preference	Specifies the preference value.	Select the preference action and type a value.
Local Preference	Specifies the BGP local preference attribute.	Select the action and type a value.
Class of Service	Specifies and applies the class-of-service parameters to routes installed into the routing table. Source class The value entered here maintains the packet counts for a route passing through your network, based on the source address. Destination class The value entered here maintains packet counts for a route passing through your network, based on the destination address in the packet. Forwarding class	Type the source class. Type the destination class. Type the forwarding class.

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