Link Failures - Cisco Nexus 9000 Series Configuration Manual

Configuring ITD

Link Failures

Figure 13: Flow Symmetry in ITD ASA Deployment
This diagram shows how the source IP address of the forward flow and the destination IP address of the
reverse flow remain constant. Choosing the appropriate parameter for the each ITD service ensures flow
symmetry due to ITD IP persistence.
Link Failures
When the ASA inside or outside interface fails, the traffic coming into the other side of that ASA can be lost
because the egress interface for traffic is down. The ITD peer switch node state synchronization feature can
resolve this issue by removing the remote side of the ASA from ITD and synchronizing the node states across
the switches.
Cisco Nexus 9000 Series NX-OS Intelligent Traffic Director Configuration Guide, Release 9.x
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