Cisco 10000 - Manual (Page 148)

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Cisco 10000 Series Router Software Configuration Guide
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Chapter 4 Configuring Multiprotocol Label Switching
Session Limit Per VRF
then associate a VPDN group with a specific VPDN template. By configuring a group session limit for
a VPDN template, you can limit the maximum number of concurrent sessions allowed for all VPDN
groups associated with the VPDN template.
If you configure a group session limit for the default VPDN template (the unnamed VPDN template),
that session limit is the same for all VPDN groups not associated with a named VPDN template. If you
configure a group session limit that is less than the number of current active sessions, no sessions are
terminated and no new sessions can start. For example, if you configure a group session limit of 30 and
50 sessions are active, the router does not terminate any active sessions and it does not allow any new
sessions to start.
If a VPDN group is associated with a VPDN template and the VPDN group has a session limit
configured, the value of the VPDN group session limit takes precedence over the VPDN template session
limit if the VPDN group value is less than the VPDN template value.
You can associate a VPDN group with only one VPDN template at a time. If you associate a VPDN group
with a named VPDN template and then with a second VPDN template, the VPDN group is detached from
the first VPDN template and associated with the second.
If you attempt to associate a VPDN group with a named VPDN template that you have not configured,
the VPDN group uses the system defaults.
The session-limit global configuration command takes precedence over the group session-limit VPDN
template configuration command. The session-limit command limits the number of VPDN sessions and
the group session-limit command specifies the maximum concurrent sessions allowed across all VPDN
groups associated with a particular VPDN template.
The session limit Per VRF feature is described in the following topics:
• Application of VPDN Parameters to VPDN Groups, page 4-16
• VPDN Template Configuration, page 4-17
• Feature History for Session Limit Per VRF, page 4-17
• Restrictions for Session Limit Per VRF, page 4-17
• Prerequisites for Session Limit Per VRF, page 4-17
• Configuring Session Limit Per VRF, page 4-18
• Verifying a Session Limit Per VRF Configuration, page 4-19
• Configuration Examples for Session Limit Per VRF, page 4-19
• Monitoring and Maintaining Session Limit Per VRF, page 4-21
Application of VPDN Parameters to VPDN Groups
By default, the router applies VPDN parameters to a VPDN group in the following way:
• VPDN parameters configured for the individual VPDN group are always applied to that VPDN
group.
• VPDN parameters configured in the VPDN template are applied for any setting not specified in the
individual VPDN group configuration.
• System default settings for VPDN parameters are applied for any setting not configured in the
individual VPDN group or VPDN template.
When you detach a VPDN group from a VPDN template by using the no source vpdn-template
command, the router applies VPDN parameters to that VPDN group in the following way: