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Configuring MSTP for VPLS

By using either the vlan-id statement or the vlan-tags statement to configure a normalizing VLAN identifier. By using the input-vlan-map and the output-vlan-map statements at the [edit interfaces interface-name unit logic-unit-number ] or [edit logical-systems logical-system-name interfaces interface-name unit logic-unit-number ] hierarchy level to configure VLAN mapping. The normalizing VLAN identifier is used to perform the following functions:.

Create multiple learning domains that each contain a learn VLAN identifier. To configure a VLAN identifier for a VLAN, include either the vlan-id or the vlan-tags statement at the [edit interfaces interface-name unit logic-unit-number ] or [edit logical-systems logical-system-name interfaces interface-name unit logic-unit-number ] hierarchy level, and then include that logical interface in the VLAN configuration. For a VPLS routing instance, include either the vlan-id or vlan-tags statement at the [edit interfaces interface-name unit logic-unit-number ] or [edit logical-systems logical-system-name interfaces interface-name unit logic-unit-number ] hierarchy level, and then include that logical interface in the VPLS routing instance configuration.

Option: Limiting the Number of MAC Addresses Learned on a VPLS Interface

ACX Series routers do not support the [edit logical-systems] hierarchy. The limit is applied to all logical interfaces belonging to the VLAN for which a separate interface MAC address limit is not configured. The limit is applied to a specific logical interface in the VLAN for which it is configured.

This limit is applied to all logical interfaces belonging to the VPLS for which a separate interface MAC address limit is not configured. This limit is applied to a specific logical interface in the VPLS for which it is configured. The configuration for the VPLS routing instance statements is explained in the following sections:.

If you attempt to configure the statements that enable BGP signaling for the VPLS routing instance the site , site-identifier , and site-range statements and the statements that enable LDP signaling for the same instance the neighbor and vpls-id statements , the commit operation fails. In the VPLS documentation, the word router in terms such as PE router is used to refer to any device that provides routing functions.

Configuring the Site Range.


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To configure the site name and the site identifier, include the site and the site-identifier statements:. Only one site is allowed per routing instances when using the automatic-side-id function.

Re: VPLS MAC Learning

To configure automatic site identifiers for a VPLS routing instance, include the automatic-site-id statement:. The automatic-site-id statement includes a number of options that control different delays in network layer reachability information NLRI advertisements. All of these options are configured with default values. See the statement summary for the automatic-site-id statement for more information. The automatic-site-id statement includes the following options:.


  • Configuring MAC Address Limit for VLANs;
  • Configuring VPLS and Integrated Routing and Bridging;
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  • Configuring BGP Signaling for VPLS.
  • Understanding Qualified MAC Learning.

If the PE router receives a competing claim advertisement for the same site identifier during this time period, it initiates the collision resolution procedure for site identifiers. This time interval is also applied whenever the automatic site identifier feature is activated on a VPLS routing instance other than at startup.

VLANs and VPLS Routing Instances - TechLibrary - Juniper Networks

Effectively, this timer indicates how long to wait before an attempt is made to allocate a site identifier. This timer is also triggered whenever a VPLS routing instance is enabled. A collision occurs whenever an attempt is made to claim a site identifier by two separate VPLS sites. The site range specifies an upper limit on the maximum site identifier that can be accepted to allow a pseudowire to be brought up.

QFX Series per VLAN

You must specify a value from 1 through 65, The default value is 65, We recommend using the default. Pseudowires cannot be established to sites with site identifiers greater than the configured site range. If you issue the show vpls connections command, such sites are displayed as OR out of range. There are networks that require that the site range be configured using a value smaller than the local site identifier, for example, a hub-and-spoke VPLS with multihomed sites.

For this type of network, you need to allow pseudowires to be established between the spoke routers and the hub router.

However, you also need to prevent pseudowires from being established between spoke routers directly. Due to the multihoming requirement of spoke sites, Layer 2 VPN NRLIs need to be accepted from other spoke routers at least from spokes with the same site identifier as the locally configured sites to determine the status of local spoke routers active or not active based on the local preference included in the NRLIs received from the other spoke routers. This type of VPLS network can be implemented by, for example, numbering hub sites with identifiers 1 through 8 and spoke sites with identifiers 9 and larger.

You can then configure a site range of 8 on each of the spoke sites. Although the spoke sites accept NRLIs and install them in the Layer 2 VPN routing tables allowing the multihomed sites to determine the status of the local site , the spoke sites cannot establish pseudowires directly to the other spoke sites due to the configured site range. The following configurations illustrate this concept.


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