R3166-R3206-HP High-End Firewalls Network Management Command Reference-6PW101

Table Of Contents
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The summary automatic command helps BGP limit the number of routes redistributed from IGP to reduce
the size of the routing table.
Examples
# In BGP view, enable automatic route summarization.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] summary automatic
# In BGP-VPN instance view, enable automatic summarization (the VPN has been created).
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ipv4-family vpn-instance vpn1
[Sysname-bgp-vpn1] summary automatic
synchronization (BGP view)
Syntax
synchronization
undo synchronization
View
BGP view
Default level
2: System level
Parameters
None
Description
Use the synchronization command to enable the synchronization between the BGP and IGP routes.
Use the undo synchronization command to disable the synchronization.
The feature is disabled by default.
With this feature enabled and when a non-BGP router is responsible for forwarding packets in an AS,
BGP speakers in the AS cannot advertise routing information to other ASs unless all routers in the AS
know the latest routing information.
When a BGP router receives an IBGP route, it checks only whether the next hop is reachable by default.
If the synchronization is enabled, the IBGP route is synchronized and advertised to EBGP peers only
when the route is also advertised by IGP. Otherwise, the IBGP route cannot be advertised to EBGP peers.
Examples
# Enable the synchronization between BGP and IGP routes.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] synchronization