Prisma Access Hot Potato Routing
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Prisma Access Docs
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5.2 Preferred and Innovation
- 5.2 Preferred and Innovation
- 5.1 Preferred and Innovation
- 5.0 Preferred and Innovation
- 4.2 Preferred
- 4.1 Preferred
- 4.0 Preferred
- 3.2 Preferred and Innovation
- 3.1 Preferred and Innovation
- 3.0 Preferred and Innovation
- 2.2 Preferred
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- Allocate Licenses for Prisma Access (Managed by Strata Cloud Manager)
- Plan Service Connections for Prisma Access (Managed by Strata Cloud Manager) and Add-ons
- Add Additional Locations for Prisma Access (Managed by Strata Cloud Manager) and Add-ons
- Enable Available Add-ons for Prisma Access (Managed by Strata Cloud Manager)
- Search for Subscription Details
- Share a License for Prisma Access (Managed by Strata Cloud Manager) and Add-ons
- Increase Subscription Allocation Quantity
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- Activate a License for Prisma Access (Managed by Strata Cloud Manager) and Prisma SD-WAN Bundle
- Activate and Edit a License for SASE 5G Through Common Services
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- General Onboarding Instructions for Prisma Access
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3.0 Preferred and Innovation
- 4.0 & Later
- 3.2 Preferred and Innovation
- 3.1 Preferred and Innovation
- 3.0 Preferred and Innovation
- 2.2 Preferred
- Prisma Access China
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- Prisma Access
- Prisma Access Infrastructure Management
- Cadence for Software and Content Updates for Prisma Access
- Use the Prisma Access App to Get Upgrade Alerts and Updates
- View Prisma Access Software Versions
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- Determine Your Prisma Access License Type from Panorama
- Cheat Sheet: Integrate ADEM with Panorama Managed Prisma Access
- Cheat Sheet: Integrate IoT Security with Panorama Managed Prisma Access
- Cheat Sheet: Enterprise DLP on Panorama Managed Prisma Access
- Visibility and Monitoring Features in the Prisma Access App
- Monitor Your Prisma Access Data Transfer Usage
- Zone Mapping
- Prisma Access APIs
- Prisma Access Deployment Progress and Status
- Troubleshoot the Prisma Access Deployment
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- Prisma Access Mobile User Deployments
- How the GlobalProtect App Selects a Prisma Access Location for Mobile Users
- Integrate Prisma Access with On-Premises Gateways
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- Set Equal Gateway Priorities for On-Premises and Prisma Access Gateways
- Set a Higher Gateway Priority for an On-Premises Gateway
- Set Higher Priorities for Multiple On-Premises Gateways
- Configure Priorities for Prisma Access and On-Premises Gateways
- Allow Mobile Users to Manually Select Specific Prisma Access Gateways
- Report Prisma Access Website Access Issues
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- Multitenancy Overview
- Multitenancy Configuration Overview
- Plan Your Multitenant Deployment
- Create an All-New Multitenant Deployment
- Enable Multitenancy and Migrate the First Tenant
- Add Tenants to Prisma Access
- Delete a Tenant
- Create a Tenant-Level Administrative User
- Sort Logs by Device Group ID in a Multitenant Deployment
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- Default Routes With Prisma Access Traffic Steering
- Traffic Steering in Prisma Access
- Traffic Steering Requirements
- Default Routes with Traffic Steering Example
- Default Routes with Traffic Steering Direct to Internet Example
- Default Routes with Traffic Steering and Dedicated Service Connection Example
- Prisma Access Traffic Steering Rule Guidelines
- Configure Zone Mapping and Security Policies for Traffic Steering Dedicated Connections
- Configure Traffic Steering in Prisma Access
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- Integrate Prisma Access With Other Palo Alto Networks Apps
- Integrate Third-Party Enterprise Browser with Explicit Proxy
- Integrate Third-Party NDRs with Prisma Access
- Juniper Mist Integration for SASE Health
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- Connect your Mobile Users in Mainland China to Prisma Access Overview
- Configure Prisma Access for Mobile Users in China
- Configure Real-Name Registration and Create the VPCs in Alibaba Cloud
- Attach the CEN and Specify the Bandwidth
- Create Linux Instances in the Alibaba Cloud VPCs
- Configure the Router Instances
- Onboard the GlobalProtect Gateway and Configure the Prisma Access Portal
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- INC_CIE_AGENT_DISCONNECT
- INC_CIE_DIRECTORY_DISCONNECT
- INC_GLOBALPROTECT_GW_USER_AUTH_ TIMEOUT_FAILURES_COUNT_EXCEEDED_ ABOVE_BASELINE_ALL_PA_LOCATIONS
- INC_GLOBALPROTECT_GW_USER_AUTH_ TIMEOUT_FAILURES_COUNT_EXCEEDED_ ABOVE_BASELINE_PER_PA_LOCATION
- INC_GLOBALPROTECT_PORTAL_AUTH_ TIMEOUT_FAILURES_COUNT_EXCEEDED_ ABOVE_BASELINE_ALL_PA_LOCATIONS
- INC_GLOBALPROTECT_PORTAL_AUTH_ TIMEOUT_FAILURES_COUNT_EXCEEDED_ ABOVE_BASELINE_PER_PA_LOCATION
- INC_MU_AUTH_SERVER_UNREACHABLE_ALL_ PA_LOCATIONS
- INC_MU_AUTH_SERVER_UNREACHABLE_PER_ PA_LOCATION
- INC_MU_DNS_SERVER_UNREACHABLE_ALL_ PA_LOCATIONS
- INC_MU_DNS_SERVER_UNREACHABLE_ PER_PA_LOCATION
- INC_PORTAL_CLIENTLESS_VPN_AUTH_ TIMEOUT_FAILURES_COUNT_EXCEEDED_ ABOVE_BASELINE_ALL_PA_LOCATIONS
- INC_PORTAL_CLIENTLESS_VPN_AUTH_ TIMEOUT_FAILURES_COUNT_EXCEEDED_ ABOVE_BASELINE_PER_PA_LOCATION
- INC_RN_AUTH_SERVER_UNREACHABLE_ALL_ PA_LOCATIONS
- INC_RN_AUTH_SERVER_UNREACHABLE_PER_ PA_LOCATION
- INC_RN_DNS_SERVER_UNREACHABLE_ALL_ PA_LOCATIONS
- INC_RN_DNS_SERVER_UNREACHABLE_PER_ PA_LOCATION
- INC_RN_ECMP_TUNNEL_RTT_EXCEEDED_ BASELINE
- INC_RN_PRIMARY_WAN_TUNNEL_RTT_ EXCEEDED_BASELINE
- INC_RN_SECONDARY_TUNNEL_DOWN
- INC_RN_SECONDARY_WAN_TUNNEL_RTT_ EXCEEDED_BASELINE
- INC_RN_SITE_CAPACITY_PREDICTION
- INC_SC_PRIMARY_WAN_TUNNEL_RTT_ EXCEEDED_BASELINE
- INC_SC_SECONDARY_WAN_TUNNEL_RTT_ EXCEEDED_BASELINE
- INC_SC_SITE_CAPACITY_PREDICTION
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- INC_CERTIFICATE_EXPIRY
- INC_GP_CLIENT_VERSION_UNSUPPORTED
- INC_MU_IP_POOL_BLOCK_UTILIZATION_ EXCEEDED_CAPACITY
- INC_MU_IP_POOL_BLOCK_UTILIZATION_ EXCEEDED_THRESHOLD
- INC_PA_INFRA_DEGRADATION
- INC_PA_SERVICE_DEGRADATION_PA_LOCATION
- INC_PA_SERVICE_DEGRADATION_RN_ SITE_CONNECTIVITY
- INC_PA_SERVICE_DEGRADATION_SC_ CONNECTIVITY
- INC_RN_ECMP_BGP_DOWN
- INC_RN_ECMP_BGP_FLAP
- INC_RN_ECMP_PROXY_TUNNEL_DOWN
- INC_RN_ECMP_PROXY_TUNNEL_FLAP
- INC_RN_ECMP_TUNNEL_DOWN
- INC_RN_ECMP_TUNNEL_FLAP
- INC_RN_PRIMARY_WAN_BGP_FLAP
- INC_RN_PRIMARY_WAN_PROXY_TUNNEL_DOWN
- INC_RN_PRIMARY_WAN_PROXY_TUNNEL_FLAP
- INC_RN_PRIMARY_WAN_TUNNEL_DOWN
- INC_RN_PRIMARY_WAN_TUNNEL_FLAP
- INC_RN_SECONDARY_WAN_BGP_DOWN
- INC_RN_SECONDARY_WAN_BGP_FLAP
- INC_RN_SECONDARY_WAN_PROXY_TUNNEL_DOWN
- INC_RN_SECONDARY_WAN_PROXY_TUNNEL_FLAP
- INC_RN_SECONDARY_WAN_TUNNEL_DOWN
- INC_RN_SECONDARY_WAN_TUNNEL_FLAP
- INC_RN_SITE_DOWN
- INC_RN_SITE_LONG_DURATION_CAPACITY_ EXCEEDED_THRESHOLD
- INC_RN_SITE_LONG_DURATION_EXCEEDED_ CAPACITY
- INC_RN_SPN_LONG_DURATION_CAPACITY_EXCEEDED _THRESHOLD
- INC_RN_SPN_LONG_DURATION_EXCEEDED_ CAPACITY
- INC_SC_PRIMARY_WAN_BGP_DOWN
- INC_SC_PRIMARY_WAN_BGP_FLAP
- INC_SC_PRIMARY_WAN_PROXY_TUNNEL_DOWN
- INC_SC_PRIMARY_WAN_PROXY_TUNNEL_FLAP
- INC_SC_PRIMARY_WAN_TUNNEL_DOWN
- INC_SC_PRIMARY_WAN_TUNNEL_FLAP
- INC_SC_SECONDARY_WAN_BGP_DOWN
- INC_SC_SECONDARY_WAN_BGP_FLAP
- INC_SC_SECONDARY_WAN_PROXY_TUNNEL_DOWN
- INC_SC_SECONDARY_WAN_PROXY_TUNNEL_FLAP
- INC_SC_SECONDARY_WAN_TUNNEL_DOWN
- INC_SC_SECONDARY_WAN_TUNNEL_FLAP
- INC_SC_SITE_DOWN
- INC_SC_SITE_LONG_DURATION_CAPACITY_ EXCEEDED_THRESHOLD
- INC_SC_SITE_LONG_DURATION_EXCEEDED_ CAPACITY
- INC_ZTNA_CONNECTOR_APP_STATUS_DOWN
- INC_ZTNA_CONNECTOR_APP_STATUS_DOWN_PARTIAL
- INC_ZTNA_CONNECTOR_CPU_HIGH
- INC_ZTNA_CONNECTOR_MEMORY_HIGH
- INC_ZTNA_CONNECTOR_TUNNEL_DOWN
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- AL_CIE_AGENT_DISCONNECT
- AL_CIE_DIRECTORY_DISCONNECT
- AL_MU_IP_POOL_CAPACITY
- AL_MU_IP_POOL_USAGE
- AL_RN_ECMP_BGP_DOWN
- AL_RN_ECMP_BGP_FLAP
- AL_RN_PRIMARY_WAN_BGP_DOWN
- AL_RN_PRIMARY_WAN_BGP_FLAP
- AL_RN_PRIMARY_WAN_TUNNEL_DOWN
- AL_RN_PRIMARY_WAN_TUNNEL_FLAP
- AL_RN_SECONDARY_WAN_BGP_DOWN
- AL_RN_SECONDARY_WAN_BGP_FLAP
- AL_RN_SECONDARY_WAN_TUNNEL_DOWN
- AL_RN_SECONDARY_WAN_TUNNEL_FLAP
- AL_RN_SITE_DOWN
- AL_RN_SITE_LONG_DURATION_CAPACITY_ EXCEEDED_THRESHOLD
- AL_RN_SITE_LONG_DURATION_EXCEEDED_ CAPACITY
- AL_RN_SPN_LONG_DURATION_CAPACITY_ EXCEEDED_THRESHOLD
- AL_SC_PRIMARY_WAN_BGP_DOWN
- AL_SC_PRIMARY_WAN_BGP_FLAP
- AL_SC_PRIMARY_WAN_TUNNEL_DOWN
- AL_SC_PRIMARY_WAN_TUNNEL_FLAP
- AL_SC_SECONDARY_WAN_BGP_DOWN
- AL_SC_SECONDARY_WAN_BGP_FLAP
- AL_SC_SECONDARY_WAN_TUNNEL_DOWN
- AL_SC_SECONDARY_WAN_TUNNEL_FLAP
- AL_SC_SITE_DOWN
- AL_SC_SITE_LONG_DURATION_CAPACITY_ EXCEEDED_THRESHOLD
- AL_SC_SITE_LONG_DURATION_EXCEEDED_CAPACITY
- AL_ZTNA_CONNECTOR_APP_STATUS_DOWN
- AL_ZTNA_CONNECTOR_APP_STATUS_DOWN_PARTIAL
- AL_ZTNA_CONNECTOR_CPU_HIGH
- AL_ZTNA_CONNECTOR_MEMORY_HIGH
- AL_ZTNA_CONNECTOR_TUNNEL_DOWN
- New Features in Incidents and Alerts
- Known Issues
Prisma Access Hot Potato Routing
Learn about how hot potato routing works for Prisma Access
service connections.
When you select Hot Potato Routing,
Prisma Access egresses the traffic bound to service connections/data
centers from its internal network as quickly as possible.
With hot potato routing, Prisma Access prepends the AS path (AS-PATH)
to the BGP prefix advertisements sent from gateways. This prepending
is performed when the prefixes are advertised out of the service
connection to your organization’s on-premises CPE. Prisma Access
prepends the AS-PATHs so that your CPE gives the correct preference
to the primary and secondary tunnels, so that if the primary tunnel
goes down, your CPE chooses the secondary tunnel as the backup.
If you specified a different IP address for the secondary (backup)
BGP peer, Prisma Access adds more prepends based on the tunnel type,
as shown in the following table.
Prefix Type | Service Connection Tunnel Type | Number of As-Path Prepends | Total AS-PATHs Seen on the CPE |
---|---|---|---|
Gateway prefixes from primary service connection | Primary or Secondary tunnel with the same BGP peer IP address | 0 | 1 |
Gateway prefixes from backup service connection | Primary or Secondary tunnel with the same BGP peer IP address | 3 | 4 |
Gateway prefixes from all other service connections | Primary or Secondary tunnel with the same BGP peer IP address | 6 | 7 |
Gateway prefixes from primary service connection | Secondary tunnel with a different BGP peer IP address | 1 | 2 |
Gateway prefixes from backup service connection | Secondary tunnel with a different BGP peer IP address | 4 | 5 |
Gateway prefixes from all other service connections | Secondary tunnel with a different BGP peer IP address | 7 | 8 |
In hot potato routing mode, Prisma Access allows you to specify
a backup service connection (Backup SC)
during onboarding. Specifying a Backup SC informs Prisma
Access to use that service connection as the backup when a service
connection link fails.
The following figure shows a hot potato routing configuration
for traffic between the US service connection and AS 200, with the
EU service connection configured as the Backup SC of
the US connection. Using hot potato routing, Prisma Access sends
the traffic from its closest exit path through the US service connection.
The return traffic takes the same path through AS100 because this
path has a shorter AS-PATH to the mobile user pool in the US location.
Prisma Access prepends the AS-PATH to its prefix advertisements
depending on whether the tunnel is a primary tunnel, a backup tunnel,
or not used for either primary or backup.

Because you have set up a backup service connection, if the link
to the US service connection goes down, hot potato routing sends
the traffic out using its shortest route through the EU service
connection. This routing scenario also applies to networks that
use route aggregation.

You can also use backup service connections for multiple service
connections in a single region. The following figure shows a Prisma
Access deployment with two service connections in the North America region.
In this case, you specify a Backup SC of
US-E for the US-W service connection, and vice versa, to ensure
symmetric routing.
