Cisco Cloud Application Policy Infrastructure Controller Release Notes, Release 5.1(3)

February 12, 2021

Moved bug CSCvw49898 from the Open Issues table to the Known Issues table.

Added bug CSCvt88137 to the Open Issues table.

February 1, 2021

Release 5.1(3e) became available.

Ability to map network security groups (NSGs) to subnets

NSGs are now mapped to subnets instead of EPGs. Prior to release 5.1(3), NSGs were mapped to EPGs.

For more information, see the Cisco Cloud APIC for Azure User Guide, Release 5.1(x).

Support for non-Cisco ACI  on-premises destinations over express route

Support is now available to represent non-Cisco ACI on-premises destinations that are reachable over an Azure express route as site-ext EPGs.

For more information, see the Cisco Cloud APIC for Azure User Guide, Release 5.1(x).

Support for 40G throughput with Cisco Cloud Services Routers by increasing the maximum number of supported CSRs to 8

Up to 40G throughput is supported by version 17.3 Cisco cloud services routers. The maximum throughput for a CSR depends on the instance type. 40G throughput can be achieved because the maximum number of CSRs supported per region has been increased from 4 to 8.

For more information, see the Cisco Cloud APIC for Azure User Guide, Release 5.1(x) the Cisco Cloud APIC for Azure Installation Guide, Release 5.1(x).

Cloud services support using cloud service EPGs

You can now automate network segmentation and security policies for cloud native services and third-party services using the new cloud service EPG.

For more information, see the Cisco Cloud APIC for Azure User Guide, Release 5.1(x).

Support for assigning only a private IP address to access a Cisco Cloud Services Router

Assigning a public IP address to the Cloud APIC and Cisco Cloud Services Router (CSR) is now optional. Cloud APIC and Cisco CSRs can now operate with only a private IP address.

For more information, see the Cisco Cloud APIC for Azure User Guide, Release 5.1(x).

Restricting access using restricted security domains

Security has been enhanced for a user by restricting access using restricted security domains.

For more information, see the Cisco Cloud APIC for Azure User Guide, Release 5.1(x).

Support for third-party load balancers

A third party load-balancer is a non-cloud native Layer 4 to Layer 7 services load balancer. You can now use third-party load balancers for Azure deployments.

For more information, see the Cisco Cloud APIC for Azure User Guide, Release 5.1(x).

Layer 4 to Layer 7 services redirect support for cloud native and third-party services

The Layer 4 to Layer 7 service redirect feature for Cisco Cloud APIC now supports cloud native and third-party services.

For more information, see the Cisco Cloud APIC for Azure User Guide, Release 5.1(x).

Support for Layer 4 to Layer 7 services redirect and non-redirect service graphs for site-ext EPGs over an express route

You can now use Layer 4 to Layer 7 services redirect and non-redirect service graphs for site-ext EPGs over an express route.

Support for segmentation using multiple VRF tables per VNet

Segmentation is now supported using multiple VRF tables per Azure virtual network (VNet).

Support for custom naming for Layer 4 to Layer 7 service deployments

You can now provide custom names to cloud resources, such as network load balancers, application load balancers, and device application security groups.

CSCvo30542

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

5.1(3e) and later

CSCvt52797

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

5.1(3e) and later

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.

5.1(3e) and later

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.

5.1(3e) and later

CSCvu64277

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

5.1(3e) 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.

5.1(3e) and later

CSCvu72020

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

5.1(3e) and later

CSCvu72354

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

5.1(3e) and later

CSCvu78074

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

5.1(3e) 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.

5.1(3e) 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.

5.1(3e) 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

5.1(3e) and later

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.

5.1(3e) 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.

5.1(3e) and later

CSCvw27056

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

5.1(3e) and later

CSCvw36844

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

5.1(3e) 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.

5.1(3e) 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.

5.1(3e) and later

CSCvw48256

The primary CIDR of CtxProfile defines the VPC/VNet and hence cannot be changed/modified without deleting the vPC. For example, in the AWS console, you cannot simply modify or delete the primary CIDR. You must delete the entire vPC. However, in the Cisco ACI policy, a configuration post that modifies the primary CIDR will lead to an incorrect state of creating a new vPC while not deleting the old one.

Because the GUI does not allow the primary CIDR change operation (that is, deselecting the primary option from one CIDR and selecting the primary CIDR box for the other CIDR), this problem will not happen if the operation is performed using GUI.

If the operation is done using the REST API, a fault is raised for the new primary CIDR and the related subnet is not deployed in the cloud. The old CIDR is not cleaned up as well.

5.1(3e) and later

CSCvw55088

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

5.1(3e) and later

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.

5.1(3e) and later

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.

5.1(3e) and later

CSCvw60314

After upgrading one of the Cloud APIC sites to the 5.1(3) 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.

5.1(3e) and later

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.

5.1(3e) and later

CSCvw51219

In a rare scenario, in a Cisco ACI Multi-Pod fabric that has one pod with multiple spine switches, if one spine switche is power cycled due to a cold reboot (power cable removal/power failure) or gets clean reloaded, then after the spine switche has come back up, sometimes a few of the remote endpoint entries become missing from the spine switches.

5.1(3e)

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.

5.1(3e) and later

CSCvo55112

Logs are lost upon stopping the Cloud APIC instance.

5.1(3e) and later

CSCvo95998

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

5.1(3e) 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.

5.1(3e) 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.

5.1(3e) 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.

5.1(3e) 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.

5.1(3e) and later

CSCvu88006

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

5.1(3e) 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.

5.1(3e) 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.

5.1(3e) 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.

5.1(3e) and later

CSCvw49898

When the downgrading from the 5.1(3) 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.

5.1(3e) 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.

5.1(3e) and later

CSCvw51544

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

5.1(3e) and later