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You can specify a router ID manually. If not, the system selects an IP address as the
router ID. The selection sequence is the highest IP address among loopback
interface addresses; if not available, then the highest IP address of interfaces. It is
recommended to specify a loopback interface address as the router ID to enhance
network reliability.
Only when the interface with the selected Router ID or the manual Router ID is
deleted will the system select another ID for the router.
Examples # Specifies the Router ID as 10.18.4.221.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] router-id 10.18.4.221
summary automatic
Syntax summary automatic
undo summary automatic
View BGP view/BGP-VPN instance view
Parameters None
Description Use the
summary automatic command to enable automatic summarization for
redistributed subnets.
Use the
undo summary automatic command to disable automatic
summarization.
By default, automatic summarization is disabled.
Note that:
■ Neither the default route nor the routes imported using the network
command can be summarized automatically.
■ With this feature enabled, BGP limits the subnets redistribution from IGP to
reduce the size of routing table.
Examples # In BGP view, enable automatic 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
