Configure BGP on an Advanced Routing Engine

Configure a Logical Router.

Enable BGP and configure general BGP settings.

Select
Network
Routing
Logical Routers
and select a logical router.
Select
BGP
General
and
Enable
BGP for this logical router.

Assign a
Router ID
to BGP for the logical router, which is typically an IPv4 address to ensure the Router ID is unique.
Assign the
Local AS
, which is the number of the AS to which the logical router belongs; range is 1 to 4,294,967,295.
If you want to apply BFD to BGP, for
Global BFD Profile
select a BFD profile you created, or select the
default
profile, or create a new BFD profile; default is
None (Disable BFD)
.
Select
Install Route
to install learned BGP routes into the global routing table; default is disabled.
Select
Fast Failover
to have BGP terminate a session with an adjacent peer if the link to that peer goes down, without waiting for the Hold Time to expire; default is enabled.
Select
Graceful Shutdown
to have BGP lower the preference of eBGP peering links during a maintenance operation so that BGP can choose and propagate alternative paths, based on RFC 8326; default is disabled.
Select
ECMP Multiple AS Support
if you configured ECMP and you want to run ECMP over multiple BGP autonomous systems; default is disabled.
Enforce First AS
to cause the firewall to drop an incoming Update packet 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; default is enabled.
Specify the
Default Local Preference
that can be used to determine preferences among different paths; range is 0 to 4,294,967,295; default is 100.
Enable
Graceful Restart and configure the following timers:
Stale Route Time (sec)
—Specifies 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 (sec)
—Specifies 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
—Specifies the length of time, in seconds, that the local device waits to restart. This value is advertised to peers (range is 1 to 3,600; default is 120).
For
Path Selection
:
Always Compare MED
—Enable this comparison to choose paths from neighbors in different autonomous systems; default is disabled.
Deterministic MED Comparison
—Enable this comparison to choose between routes that are advertised by IBGP peers (BGP peers in the same autonomous system); default is enabled.
Click
OK
.

Configure a BGP peer group.

Select
Routing
Logical Routers
and select a logical router.
Select
BGP
Peer Group
and
Add
a BGP peer group by
Name
(maximum of 63 characters). TThe name must start with an alphanumeric character, underscore (_), hyphen (-), or dot (.) and can contain alphanumeric characters, underscores, hyphens and dots. A space is not allowed. The name must be unique within the logical router and across all logical routers.

Enable
the peer group.
Select the
Type
of peer group:
IBGP
or
EBGP
.
To specify many
IPv4 Address Family
options for the peer group, select an
AFI Profile
that you created, select the
default
profile, or create a new BGP Address Family profile; the default is
None
.
To specify many
IPv6 Address Family
options for the peer group, select an
AFI Profile
that you created, select the
default
profile, or create a new BGP Address Family profile; the default is
None
.
To apply
IPv4 Filtering Profile
options to the peer group, select a
BGP Filtering Profile
that you created or create a new BGP Filtering profile; the default is
None
.
A BGP Filtering Profile describes how to configure many BGP options for IPv4, such as import or export BGP routes, accept or prevent routes being added to the local BGP RIB, conditionally advertise routes, and unsuppress dampened or summarized routes.
To apply
IPv6 Filtering Profile
options to the peer group, select a
BGP Filtering Profile
that you created or create a new BGP Filtering profile; the default is
None
.
A BGP Filtering Profile describes how to configure many BGP options for IPv6, such as import or export BGP routes, accept or prevent routes being added to the local BGP RIB, conditionally advertise routes, and unsuppress dampened or summarized routes.
For Connection Options, select an
Auth Profile
or create a new BGP Authentication profile to control MD5 authentication between BGP peers in the peer group. Default is
None
.
Select a
Timer Profile
or create a new BGP Timer Profile to control various BGP timers that affect keepalive and update messages that advertise routes. Default is
None
.
Set
Multi Hop
—the time-to-live (TTL) value in the IP header (range is 0 to 255; default is 0). The default value of 0 means 1 for eBGP. The default value of 0 means 255 for iBGP.
Select a
Dampening Profile
or create a new Dampening Profile to determine how to penalize a flapping route to suppress it from being used until it stabilizes. Default is
None
.

Add a BGP peer to the peer group.

Add
a peer by
Name
(maximum of 63 characters). The name must start with an alphanumeric character, underscore (_), hyphen (-), or dot (.) and can contain alphanumeric characters, underscores, hyphens and dots. A space is not allowed. The name must be unique within the logical router and across all logical routers.
Enable
the peer; default is enabled.
Select
Passive
to prevent the peer from initiating a session with its neighbors; default is disabled.
Enter the
Peer AS
to which the peer belongs; range is 1 to 4,294,967,295.
Select
Addressing
and select whether the peer will
Inherit
IPv4 and IPv6 AFI and filtering profiles from the peer group:
Yes
(default) or
No
.
If you chose
Yes
, specify the following for the peer:
For
Local Address
, select the
Interface
for which you are configuring BGP. If the interface has more than one IP address, select the
IP Address
for that interface to be the BGP peer.
For
Peer Address
, select either
IP
and select the IP address or select or create an address object, or select
FQDN
and enter the FQDN or address object that is type FQDN.
The firewall uses only one IP address (from each IPv4 or IPv6 address type) from the DNS resolution of the FQDN. If the DNS resolution returns more than one address, the firewall uses the preferred IP address that matches the IP family type (IPv4 or IPv6) configured for the BGP peer. The preferred IP address is the first address the DNS server returns in its initial response. The firewall retains this address as preferred as long as the address appears in subsequent responses regardless of its order.

If you chose
No
for
Inherit
addressing from the peer group, specify the following for the peer:
To specify many
IPv4 Address Family
options for the peer, select an
AFI Profile
that you created, select the
default
profile, select
inherit (Inherit from Peer-Group)
, or create a new BGP Address Family profile; the default is
none (Disable IPv4 AFI)
.
The AFI Profile allows you to specify that the peer is a Route Reflector client. The Route Reflector reflects all the advertisements from all its peers to all the other peers, thus avoiding the need for the iBGP to be fully meshed. If you declare the peer a Route Reflector client, the BGP process reflects all of the updates to that peer.
To specify many
IPv6 Address Family
options for the peer, select an
AFI Profile
that you created, select
inherit (Inherit from Peer-Group)
, or create a new BGP Address Family profile; the default is
none (Disable IPv6 AFI)
.
The AFI Profile allows you to specify that the peer is a Route Reflector client. The Route Reflector reflects all the advertisements from all its peers to all the other peers, thus avoiding the need for the iBGP to be fully meshed. If you declare the peer a Route Reflector client, the BGP process reflects all of the updates to that peer.
To apply
IPv4 Filtering Profile
options to the peer, select a
BGP Filtering Profile
that you created, select
inherit (Inherit from Peer-Group)
, or create a new BGP Filtering profile; the default is
none (Disable IPv4 Filtering)
.
To apply
IPv6 Filtering Profile
options to the peer, select a
BGP Filtering Profile
that you created, select
inherit (Inherit from Peer-Group)
, or create a new BGP Filtering profile; the default is
none (Disable IPv6 Filtering)
.
For
Local Address
, select the
Interface
for which you are configuring BGP. If the interface has more than one IP Address, select the
IP address
for that interface to be the BGP peer.
For
Peer Address
, select either
IP
and select the IP address or select or create an address object, or select
FQDN
and enter the FQDN or address object that is type FQDN.

A BGP peer group (or a peer) can have both an IPv4 Address Family profile and an IPv6 Address Family profile applied to it. All peers belonging to that peer group will automatically have Addressing set to Inherit
No
. All peers in the peer group will also have IPv4 Address Family profile, IPv6 Address Family profile, IPv4 Filtering Profile, and IPv6 Filtering Profile set to
none
by default. In order for routing to function properly, the peering interface must have both an IPv4 address and IPv6 address assigned. You can select inherit (Inherit from Peer-Group) or override the peer group by selecting a specific profile for the peer. For example, you can configure a peer to
inherit
the IPv4 Address Family profile and
inherit
the IPv4 Filtering Profile, and select an IPv6 Address Family profile and IPv6 Filtering Profile to override those profiles from the peer group.
Select
Connection Options
for the peer in order to apply settings that differ from those of the peer group.

Select an
Auth Profile
,
inherit (Inherit from Peer-Group)
(the default), or create a new BGP Authentication profile to control MD5 authentication between BGP peers.
Select a
Timer Profile
,
inherit (Inherit from Peer-Group)
(the default), create a new BGP Timer Profile, or select the
default
profile to control various BGP timers that affect keepalive and update messages that advertise routes.
Set
Multi Hop
, which is the time-to-live (TTL) value in the IP header (range is 0 to 255). The default setting is
inherit (Inherit from Peer-Group)
.
Select a
Dampening Profile
,
inherit (Inherit from Peer-Group)
(the default), or create a new Dampening Profile to determine how to penalize a flapping route to suppress it from being used until it stabilizes.
Select
Advanced
and
Enable Sender Side Loop Detection
to have the firewall check the AS_PATH attribute of a route in its 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 the AS number to prevent a routing loop.
To apply a
BFD Profile
to the peer (which overrides the BFD setting for BGP, as long as BFD is not disabled for BGP at the logical router level), select one of the following:
The
default
profile.
An existing BFD profile.
Inherit-lr-global-setting (Inherit Protocol’s Global BFD Profile)
(default)—Peer inherits the BFD profile that you selected globally for BGP for the logical router.
None (Disable BFD)
for the peer.
Create a new BFD profile.

Click
OK
.

Specify network prefixes to advertise to neighbors.

The

Network

functionality is especially helpful after moving a firewall to a different subnet or after a temporary change in a network.

Select

Network

.

Always Advertise Network Route

(default is enabled) to always advertise the configured network routes to BGP peers, regardless of whether they are reachable or not. If this is unchecked, the firewall advertises the network routes only if they are resolved using the local route table.

Select

IPv4

or

IPv6

to select type of prefix.

Add

a

Network

prefix to advertise to neighbors.

Select

Unicast

to advertise this network route in the Unicast Address Family; default is enabled. If unchecked, the firewall does not advertise the route in the Unicast SAFI.

(

IPv4 only

) Select Multicast to advertise this network route into the Multicast Address Family. Default is disabled; the firewall does not advertise this network route in the Multicast SAFI.

(

IPv4 only

) Select

Backdoor

to prevent BGP from advertising the prefix outside of the AS and instead to keep the route within the AS. A backdoor is a BGP route that has a higher administrative distance than an IGP route. Internally, the administrative distance for the prefix is increased so that the prefix isn’t preferred, but is still available if needed, in the event of a link failure elsewhere. Default is disabled.



Redistribute static, connected, OSPF, OSPFv3, or RIPv2 routes into BGP.

Within a BGP Redistribution Profile, use the flexibility of route maps to specify conditions that determine which routes to redistribute and to specify which attributes to set.

Select

Redistribution

.

To redistribute IPv4 routes, for

IPv4 Redistribution Profile -- Unicast

, select a BGP Redistribution profile or create a new Redistribution profile; default is

None

.

To redistribute IPv6 routes, for

IPv6 Redistribution Profile -- Unicast

, select a BGP Redistribution profile or create a new Redistribution profile; default is

None

.

<