BGP Routing for a Logical Router
Configure BGP for the logical router to use to route
BGP traffic.
- Network > Routing> Logical Routers > BGP
The table describes the settings to configure
BGP, peer groups, peers, and redistribution for a logical router
on an Advanced Routing Engine.
BGP Settings | Description |
---|---|
General | |
Enable | Enable BGP for the logical router. |
Router ID | Assign a Router ID to BGP for the logical
router, which is typically an IPv4 address to ensure the Router
ID is unique. |
Local AS | Assign the local autonomous system (AS)
to which the logical router belongs based on the Router ID (range
for a 2-byte or 4-byte AS number is to 1 to 4,294,967,295). |
Global BFD Profile | Select a BFD profile to apply to BGP globally.
Default is None (Disable BFD) . |
Install Route | |
Enforce First AS | Select to cause the firewall to drop an
incoming Update message from an EBGP peer that does not list the
EBGP peer’s own AS number as the first AS number in the AS_PATH
attribute. (Enabled by default.) |
Default Local Preference | Specify the default local preference that
can be used to determine preferences among different paths to the
same destination; range is 0 to 4,294,967,295;
default is 100. |
ECMP Multiple AS Support | Enable if you configured ECMP and you want
to run ECMP over multiple BGP autonomous systems. |
Fast Failover | Fast failover of EBGP is enabled by default.
Disable EBGP fast failover if it causes the firewall to unnecessarily
withdraw BGP routes. |
Graceful Restart—Enable | Enables graceful restart for BGP so that
packet forwarding is not disrupted during a BGP restart (enabled
by default). |
Stale Route Time | Specify the length of time, in seconds,
that a route can stay in the stale state (range is 1 to 3,600; default
is 120). |
Max Peer Restart Time | Specify the maximum length of time, in seconds,
that the local device accepts as a grace period restart time for
peer devices (range is 1 to 3,600; default is 120). |
Local Restart Time | |
Path Selection—Always Compare MED | Select to choose paths from neighbors in
different autonomous systems; default is disabled. The Multi-Exit
Discriminator (MED) is an external metric that lets neighbors know
about the preferred path into an AS. A lower value is preferred
over a higher value. |
Deterministic MED Comparison | Select to choose between routes that are
advertised by IBGP peers (BGP peers in the same AS). Default is
enabled. |
Peer Group | |
Name | Add a BGP peer group by Name. |
Enable | Enable the peer group. |
Type | Select the type of peer group as IBGP (Internal
BGP, peering within an AS) or EBGP (External
BGP—peering between two autonomous systems). |
AFI IPv4 Unicast | Select or create an AFI IPv4 profile to
apply the settings in the profile to the peer group; default is None . |
AFI IPv6 Unicast | Select or create an AFI IPv6 profile to
apply the settings in the profile to the peer group; default is None . |
Filtering IPv4 Unicast | Apply all the elements of a Filtering Profile
to the peer group. |
Filtering IPv6 Unicast | Apply all the elements of a Filtering Profile
to the peer group. |
Auth Profile | Select or create an authentication profile
that is used to authenticate BGP peer communications; default is None . |
Timer Profile | Select or create a Timers profile to apply
to the peer group; default is None . |
Multi Hop | Set the time-to-live (TTL) value in the
IP header. Range is 1 to 255; a setting of 0 means use the default
value: 1 for EBGP; 255 for IBGP. |
Dampening Profile | |
Peer | |
Name | Add a BGP peer by name, which must start
with an alphanumeric character and contain a maximum of 31 characters,
including letters, numbers, underscore, hyphen, period, and space. |
Enable | Enable the BGP peer. |
Passive | |
Peer AS | Enter the AS to which the peer belongs;
range is 1 to 4,294,967,295. |
Peer—Addressing | |
Inherit |
|
AFI IPv4 Unicast | ( Available if )
Select or create an AFI IPv4 profile to apply the settings in the
profile to the peer; default is Inherit No None . |
AFI IPv6 Unicast | ( Available if )
Select or create an AFI IPv6 profile to apply the settings in the
profile to the peer; default is Inherit No None . |
Filtering IPv4 Unicast | ( Available if ) Default
is Inherit No None . |
Filtering IPv6 Unicast | ( Available if ) Default
is Inherit No None . |
Local Address - Interface | ( Available if )
Select the Layer 3 interface for which you are configuring BGP.
Interfaces configured with a static IP address and interfaces configured
as a DHCP client are available to select. If you select an interface
where DHCP assigns the address, the Inherit Yes IP address
will indicate None . DHCP will later assign
an IP address to the interface; you can see the address when you
view More Runtime Stats for the logical router. |
IP Address | ( Available if )
If the interface has more than one IP address, enter the IP address
and netmask you want to use.Inherit Yes |
Peer Address - IP | ( Available if )
Enter the IP address of the peer.Inherit Yes |
Peer—Connection Options These
settings override the same option you have set for the peer group
to which the peer belongs. | |
Auth Profile | Select or create an Authentication profile.
Alternatively, select inherit (Inherit from Peer-Group) or None ,
both of which cause the peer to use the Auth profile specified for
the peer group. |
Timer Profile | Select or create a Timers profile. Alternatively,
select inherit (Inherit from Peer-Group) or None ,
both of which cause the peer to use the Timers profile specified
for the peer group. |
Multi Hop | Select inherit (Inherit from
Peer-Group) or None , both of
which cause the peer to use the value specified for the peer group. |
Dampening Profile | |
Peer—Advanced | |
Enable Sender Side Loop Detection | Select to cause the firewall to check the
AS_PATH attribute of a route in its forwarding information base
(FIB) before it sends the route in an Update, to ensure that the
peer AS number is not on the AS_PATH list. If it is, the firewall
removes it to prevent a loop. Default is enabled. |
BFD Profile | Inherit-vr-global-setting (Inherit
Protocol’s Global BFD Profile) Default
is None (Disable BFD) |
BGP Redistribution | |
Redistribution Rules | |
IPv4 Unicast | Select or create a Redistribution profile
to specify which static or connected IPv4 routes to redistribute
to the IPv4 unicast route table. Default is None . |
IPv6 Unicast | Select or create a Redistribution profile
to specify which static or connected IPv6 routes to redistribute
to the IPv6 unicast route table. Default is None . |
Network | |
IPv4 or IPv6 | Select IPv4 or IPv6 . |
Network | Add a corresponding IPv4 or IPv6 network
address; subnets with matching network addresses are advertised
to BGP peers of the logical router. |
Unicast | Select to install the matching routes into
the Unicast routing table of all BGP peers. |
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