Cisco Cloud Application Policy Infrastructure Controller Release Notes, Release 5.2(1)

October 8, 2021

Removed mention of the supported Cisco ACI product releases. Cloud APIC does not depend on any specific Cisco ACI product releases.

August 13, 2021

Removed open issues CSCvy30852, CSCvy07759, and CSCvy41881.

Moved open issues CSCvy12722, CSCvy28896, CSCvy28890, and CSCvw48190 to known issues.

August 6, 2021

Release 5.2(1h) became available. Added known issue CSCvz20282.

June 11, 2021

Added open issue CSCvy14025, CSCvy50245, and CSCvy42684.

June 7, 2021

Release 5.2(1g) became available.

Support for importing existing Azure brownfield cloud VNets into Cisco Cloud APIC

This release provides support for importing existing brownfield Azure cloud VNets (VNets that were not configured through Cisco Cloud APIC) into Cisco Cloud APIC.

For more information, see Importing Existing Brownfield Azure Cloud VNets Into Cisco Cloud APIC.

Support for Amazon Web Services (AWS) Transit Gateway Connect in Cisco Cloud APIC

Support for Amazon Web Services (AWS) Transit Gateway Connect in Cisco Cloud APIC. By using the AWS Transit Gateway Connect feature:

·       Only one AWS Transit Gateway is deployed per hub network per region

·       Equal-cost multi-path (ECMP) routing is enabled to all the CSRs in a region

For more information, see Cisco Cloud APIC for AWS Installation Guide, Release 5.2(x).

Support for manual upgrades for CSRs, independent from the Cisco Cloud APIC upgrades

You can manually trigger an upgrade of the CSRs, independent of the Cisco Cloud APIC upgrades. Prior to release 5.2(1), the CSRs were upgraded automatically whenever you trigger an upgrade for the Cisco Cloud APIC.

For more information, see:

Cisco Cloud APIC for AWS Installation Guide, Release 5.2(x)

Cisco Cloud APIC for Azure Installation Guide, Release 5.2(x)

Support for communication with an external site from regions without a CSR in AWS

You can have communication with an external site in regions without a CSR in AWS.

For more information, see Cisco Cloud APIC for AWS User Guide, Release 5.2(x).

Support for private IP addresses for CSR interfaces and Cisco Cloud APIC in AWS

You can assign a private IP address to a Cisco Cloud Services Router (CSR) and Cisco Cloud APIC in AWS.

For more information, see:

Cisco Cloud APIC for AWS Installation Guide, Release 5.2(x)

Cisco Cloud APIC for AWS User Guide, Release 5.2(x)

Support for VNet peering across Azure Active Dirtectories (ADs) to allow spoke VNets to be deployed in different subscriptions in different Azure ADs

Support is now available for VNet peering across Azure ADs, so spoke VNets can be deployed in different subscriptions in different Azure ADs. In releases prior to release 5.2(1), you must deploy the infra (hub) and spoke VNets in the same Azure AD, but you can deploy the infra and spoke VNets in different subscriptions within the same Azure AD.

For more information, see Configuring VNet Peering for Cloud APIC for Azure.

CSCvo30542

TACACS monitoring of the destination group is not supported through the GUI.

5.2(1g) and later

CSCvu64277

Stats seen on Cisco Cloud APIC are sometimes not in sync with Azure stats.

5.2(1g) and later

CSCvu66521

In the "Cloud Resources" section of the GUI, the names displayed in the "Name" column are not the same as the name of resources on the cloud. These are showing the Cloud APIC object names.

5.2(1g) and later

CSCvu72354

Adding an EPG endpoint selector fails with an error message saying the selector is already attached.

5.2(1g) and later

CSCvu78074

Route nextHop is not set to the redirect service node specified in the service graph.

5.2(1g) and later

CSCvv32664

When the CSR bandwidth needs to be increased, the user needs to undeploy all the CSRs in all the regions and redeploy with the desired bandwidth, which can cause traffic loss.

5.2(1g) and later

CSCvx16601

When the "AllowAll" flag is enabled on a service device such as a native load balancer or on the logical interface of a third party device, it is possible that to see some specific rules apart form a rule that allows all traffic from any source to any destination.

5.2(1g) and later

CSCvx67107

Third party firewalls and load balancers are not shown in the topology view.

5.2(1g) and later

CSCvy06610

The eventmgr crashes when handling a fault triggered by a new cloud account.

5.2(1g) and later

CSCvy14025

The Next Hop Routing entry missing in the ER gateway route table for redirecting the traffic going from the consumer to the provider EPG to a service device.

5.2(1g) and later

CSCvy42684

Importing a configuration into Cloud APIC 5.2 displays the following error: maximum buffer length exceeded.

5.2(1g) and later

CSCvy50245

Tunnels are down on one of the CSRs after terminating the CSR instance from the AWS Portal.

5.2(1g) and later

CSCvt52797

Some cloud-to-cloud tunnels are operationally down in external-facing CSRs.

5.2(1g)

CSCvt72525

Upon increasing the scale of Certificate Signing Requests (CSRs), a create subnet request fails and a fault is raised in the Cisco Cloud APIC.

5.2(1g)

CSCvt88137

Some of the TGW attachments to non-infra tenant VPCs might be deleted and not get recreated in the case of quickly enabling, disabling, and re-enabling the hub network to the CloudCtxProfile.

5.2(1g)

CSCvu72020

The GUI cannot properly display the service graph association in EPG communication, due to a mismatched tenant name.

5.2(1g)

CSCvw21595

When deploying a service graph on Cisco Cloud APIC, faults F3764 and F3763 appear. The ALB is deployed on AWS, but the security group is not.

5.2(1g)

CSCvw27056

A CSR's management Interface is down or inaccessible through SSH.

5.2(1g)

CSCvw36844

No UDR entries will be present if extEPG is consumer on a graph on which REDIRECT is enabled.

5.2(1g)

CSCvw57813

After a Cisco Cloud APIC upgrade, all of the Cloud Service Routers will be upgraded in two batches, even and odd. State of the cuurent batch of CSRs that are upgraded are persisted in the Cisco Cloud APIC. When the Cisco Cloud APIC is rebooted mid-upgrade of the CSRs, the state information of the upgrade will be lost. This results in the halt of the CSR upgrade process.

5.2(1g)

CSCvw58899

After a configuration import, an fvCtx managed object may have a different vrfIndex value. This would cause the configuration in the CSRs to be modified, thereby leading to traffic drops.

5.2(1g)

CSCvw60314

After upgrading one of the Cloud APIC sites to the 5.2(1) release, intersite traffic loss occurs. This is due to intersite IPSec tunnels being deleted and recreated by MSO. Traffic recovers in about 30 to 40 minutes after the tunnels are recreated.

5.2(1g)

CSCvx06278

Rules in the firewall may be missing for traffic that has a cloud site-external EPG as the consumer/source to a provider EPG/destination when redirect is enabled in the cloud graph.

5.2(1g)

CSCvo06626

When a cloudExtEpg matches on a 0/0 network and has a bi-directional contract with two cloud EPGs, such as cloudEpg1 and CloudEpg2, this can result in inadvertent communication between endpoints in cloudEpg1 and cloudEpg2 without a contract between the two EPGs themselves.

5.2(1g) and later

CSCvo55112

Logs are lost upon stopping the Cloud APIC instance.

5.2(1g) and later

CSCvo95998

There is traffic loss after a Cloud APIC upgrade. Traffic will eventually converge, but this could take a few minutes.

5.2(1g) and later

CSCvq11780

Creating VPN connections fail with the "invalidCidr" error in AWS or the "More than one connection having the same BGP setting is not allowed" error in Azure.

5.2(1g) and later

CSCvq76039

When a fault is raised in the Cloud APIC, the fault message will be truncated and will not include the entire cloud message description.

5.2(1g) and later

CSCvr01341

REST API access to the Cloud APIC becomes delayed after deleting a tenant with scaled EPGs and endpoints. The client needs to retry after receiving the error.

5.2(1g) and later

CSCvu05329

The Ctx Oper managed object is not deleted after the attachment is deleted.

5.2(1g) and later

CSCvu81355

Traffic gets dropped after downgrading to the 5.0(1) release. Cloud Services Router has incompatible configurations due to an issue with reading configurations using SSH.

5.2(1g) and later

CSCvu88006

On the Dashboard, fewer VNet peerings are shown than expected.

5.2(1g) and later

CSCvv81647

When an invalid Cloud Services Router license token is configured after initially configuring a valid token, the Cloud Services Router fails the license registration and keeps using the old valid token. This failure can only be found from the CSR event log.

5.2(1g) and later

CSCvw05821

Redirection and UDR does not take effect when traffic coming through an express route and destined to a service end point is redirected to a native load balancer or firewall.

5.2(1g) and later

CSCvw07392

Inter-site VxLAN traffic drops for a given VRF table when it is deleted and re-added. Packet capture on the CSR shows "Incomplete Adjacency" as follows:

Punt     1    Count       Code  Cause    1           10    Incomplete adjacency  <<<<<<<

Drop     1    Count       Code  Cause    1           94    Ipv4NoAdj

5.2(1g) and later

CSCvw07781

There is complete traffic loss for 180 seconds.

5.2(1g) and later

CSCvw24376

Inter region traffic is black-holed after the delete trigger for contracts/filter. It was observed that the TGW entry pointing to the remote region TGW is missing for the destination routes. On further debugging it was found that post delete trigger as part of re-add flow, when a describe call is sent to AWS got a reply with the state of this entry as "active" because of which a new create request is not being sent.

5.2(1g) and later

CSCvw39814

Infra VPC subnet route table entry for 0.0.0.0/0 route with TGW attachment as nh, is left as a stale entry upon being undeployed. There is no functional impact. Upon being redeployed, this entry is updated with the correct TGW attachment ID as nh.

5.2(1g) and later

CSCvw40737

SSH to a virtual machine's public IP address fails, despite the NSG allowing the traffic inbound. SSH to the private IP address of the virtual machine from within the VNet works.

5.2(1g) and later

CSCvw40818

After upgrading Cloud APIC, the Cloud Services Routers will be upgraded in two batches. The even set of CSRs are triggered for upgrade first. After their upgrade is complete and all of the even CSRs are datapathReady, only then the odd set of CSRs will be triggered for upgrade. When even one of the upgrade of the even CSRs fail and they don't become datapathReady, the odd set of CSRs will not be triggered for upgrade. This is the behavior followed to avoid any traffic loss.

5.2(1g) and later

CSCvw48190

When Cloud APIC is restart, the VPN connection from a tenant's VNets will get deleted and re-created, one by one. This can be seen in the Azure activity logs. It should not impact traffic, as all connections are not deleted at the same time.

5.2(1g) and later

CSCvw49898

When the downgrading from the 5.2(1) release to the 5.0(2) release, traffic loss is expected until all of the CSRs are downgraded back to the 17.1 release. The traffic loss occurs because when the CSRs are getting downgraded to the 17.1 release, the CSR NIC1s will be in the backendPools and traffic from the spokes will still be forwarded to the native load balancer. The traffic gets blackholed until the CSRs get fully programmed with all the configurations in the 17.1 release.

5.2(1g) and later

CSCvw50918

Upon downgrading Cloud APIC, VPN connections between Cloud APIC and the cloud (AWS/Azure VPN gateway) will be deleted and re-created, causing traffic loss. Traffic loss is based on how quickly the VPN connections are deleted and re-created in AWS due to AWS throttling.

5.2(1g) and later

CSCvw51544

A user who is assigned a large number of security domains may not be able to create other Cisco ACI policies.

5.2(1g) and later

CSCvw55088

A user who is assigned a large number of security domains may not be able to create other Cisco ACI policies.

5.2(1g) and later

CSCvx91010

When TGW Connect is disabled, traffic loss is observed for about 8 minutes.

5.2(1g) and later

CSCvy10936

Downgrading Cisco Cloud APIC from release 5.2(1) to 5.1(2) may cause CSRs to not be downgraded. The CSR release for 5.2(1) is 17.3.2, and the CSR version for release 5.1(2) is 17.3.1. After the Cisco Cloud APIC downgrade, the CSR version should be downgraded to 17.3.1,  but it will not happen due to this bug.

5.2(1g) and later

CSCvy12722

Loss of traffic between a cloud and Cisco ACI On-Premises deployment.

5.2(1g) and later

CSCvy13369

After upgrading AWS, infra vPC peering does not get deleted.

5.2(1g) and later

CSCvy19286

There is traffic loss after downgrading from 5.2(1) to 5.1(2).

5.2(1g) and later

CSCvy28890

There is a loss in SSH connectivity to the Cisco Cloud APIC across reboots. But, after a few minutes, the connection should come back and users will be able to SSH in to the Cisco Cloud APIC again.

5.2(1g) and later

CSCvy28896

There is an increase in the connector's memory utilization. All of the CSR workflows rerunning might happen even after the setup is in the steady state.

5.2(1g) and later

CSCvy30314

After upgrading the Cisco Cloud APIC, on the TGW route tables, the default route (0.0.0.0/0) does not point to infra VPC attachment or is missing. In this case, traffic intended to get forwarded to the CSR will be dropped or forwarded to an invalid next-hop.

5.2(1g) and later

CSCvy33435

There is intersite traffic loss when TGW Connect is enabled.

5.2(1g) and later

CSCvy34180

Cloud Intersite traffic is dropped due to the CSR in the cloud site not advertising the EVPN routes.

5.2(1g) and later

CSCvy45517

The Cisco Cloud APIC GUI shows the total allowed count for CtxProfile, VRF (fvCtx), EPGs, and contracts. These numbers have been validated only for Azure-based deployments. For AWS deployments, the numbers supported are much lower.

5.2(1g) and later

CSCvz20282

An upgrade to or downgrade from the Cloud APIC 5.2(1g) release to any release while using "Ignore Compatibility Check: no" will fail. The following fault is raised: "The upgrade has an upgrade status of Failed Due to Incompatible Desired Version."

5.2(1g) and later