What is a key benefit of BGP dynamic update peer groups?

Question

Options

• ARouting updates to the same destination are grouped to increase BGP efficiency.
• BNewly configured BGP neighbors have peer group template configurations dynamically
• CDynamic update groups use iBGP neighbor information to automatically calculate route
• DNeighbors in a peer group are no longer required to share the same outbound routing policies.
• EBGP configurations are automatically optimized by routers which dynamically create BGP

• A
  8% (2)
• B
  12% (3)
• D
  76% (19)
• E
  4% (1)

Explanation

Traditional (static) BGP peer groups required all members to share identical outbound routing policies because a single update was generated for the entire group. This constraint made peer groups inflexible. BGP dynamic update peer groups (introduced in IOS 12.4(2)T) removed this restriction: the router dynamically and automatically places neighbors into update groups based on their actual outbound policies. This means you can configure per-neighbor outbound policies (route-maps, prefix-lists, etc.) without worrying about grouping constraints. The router optimizes update generation internally. A is wrong - update groups deal with neighbor grouping, not destination grouping. B is wrong - templates are a separate feature. C is wrong - route reflector functionality is separate. E is wrong - BGP configurations are not auto-optimized in this manner.

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