Additional ECMP Settings
Table of Contents
Additional ECMP Settings
Let us learn more about the additional ECMP settings.
After you complete the basic configurations
of ECMP, there are a few additional ECMP-related settings. Follow
the sections to learn about each.
ECMP Region Location Detection
In version
2.0.3 onwards, ECMP automatically detects the closest Prisma Access
location for a branch to connect. The closest location is determined
by the values of Latitude/Longitude entered in the Site Details
for a branch.
The CloudBlade API determines the country, and
the local language support for the branch via the location. Wherever
possible, it will connect that branch to the appropriate Prisma
Access region with the language support for the country that the branch
is in.
In 2.1.1
the region needs to be changed manually to a desired region, as shown
below.
ECMP Bandwidth Detection
Starting with
version 2.0.1, ECMP uses the circuit bandwidth to automatically set
the Prisma Access bandwidth. To override this behavior, adjust the
bandwidth for ECMP accordingly.
ECMP Configuration for a Single Link
Some
organizations that plan on having two or more connections to a branch Prisma
SD-WAN ION device can pre-configure ECMP with only a single link
to a device. When configuring ECMP on a single link, the following
notes/restrictions will apply.
- The link will appear as a non-ECMP link in Prisma Access.
- When a second link is configured/enabled for Prisma Access, the site will automatically enable ECMP with symmetric return in Prisma Access.
ECMP Circuit Usage and Exemption
By default,
ECMP will build a Standard VPN to Prisma Access on up to four interfaces
which are able to reach Prisma Access. This can include, but is
not limited to Internet circuits (Cable, DSL, 3G/4G/5G/LTE) and
Private WAN Circuits (MPLS).
ECMP does NOT look at the
circuit category to bring up a path to Prisma Access. Rather, it
looks at whether or not the circuit for a device has reachability
to Prisma Access in order to add to the ECMP bundle.
There
can be situations where certain circuit categories at a global level
or circuits at a device level should be excluded or allowed to participate
in ECMP. For example, Private WAN paths may not be required at an
organization to become part of an ECMP bundle.
To accomplish
this, the following tag can be applied globally or at the device level: prisma_ecmp_exclude
Application
of the tag at the Device Interface or Global level will prevent
ECMP from using that category or port for inclusion.
ECMP Branches with High-Availability
The
2.1.1 CloudBlade version also supports High-Availability designs,
while allowing for licenses to be consumed by the Primary/Active
Prisma SD-WAN ION device, while the backup Prisma SD-WAN ION device
does not consume a license to Prisma Access.
To enable ECMP
HA licensing, under the PRIMARY/ACTIVE Prisma SD-WAN ION device,
enable the following prisma_ha_primary tag as shown.
This signals
to the CloudBlade to replicate the Standard VPN tunnels to Prisma Access
to the backup/secondary unit. In the event of a changeover to the
secondary Prisma SD-WAN ION device, the tunnels are already configured,
but do not consume licensing.
ECMP Site-Level Interface Tags
As auto
region selection and 2.1.1 are not interoperable, for each link
under the ECMP bundle/region, the local interface tags must also
be applied as described in the previous section.
prisma_region:us-east-1:us-east-charlockprisma_region:us-east-1:us-east-banyanORprisma_region:us-east-1:1prisma_region:us-east-1:2In
order to assist with the automation of the scripts/deployment, the
Prisma SD-WAN Tagger utility script can also be used to help create/configure
the tags: https://github.com/ebob9/cloudgenix_tagger