Cisco Expressway · Rate Limits

Cisco Expressway Rate Limits

Cisco Expressway is a customer-deployed appliance/VM. Per-API request rate limits are not publicly documented as cloud-style quotas; throughput is bounded by the appliance's hardware/VM sizing (Small / Medium / Large) and by call/registration capacity defined in the Cisco Expressway Administrator Guide. Login throttling and SIP/H.323 traversal limits are managed via per-zone and per-domain settings in the Expressway configuration UI rather than a uniform request-per-second policy.

Cisco Expressway Rate Limits is the machine-readable rate-limit profile for Cisco Expressway on the APIs.io network, conforming to the API Commons Rate Limits specification.

It captures 2 rate-limit definitions, measuring varies and concurrent_calls.

The profile also includes 3 backoff/retry policies defined and response codes documented for throttled and serviceUnavailable.

Tagged areas include Collaboration, Unified Communications, Video Conferencing, and Rate Limiting.

2 Limits Throttle: 429
CollaborationUnified CommunicationsVideo ConferencingRate Limiting

Limits

REST API requests appliance
varies
see Expressway Administrator Guide for capacity per appliance size
SIP / H.323 traversal calls appliance
concurrent_calls
see Cisco Expressway capacity datasheet (Small / Medium / Large)

Policies

Capacity-bounded
Limits are bounded by the Expressway VM/appliance size and Smart Licensing entitlement, not by a cloud-style per-second API throttle.
Backoff Strategy
Clients should implement exponential backoff with jitter on HTTP 429/503 responses from the REST or XML configuration APIs.
Administrative Throttles
Login throttling, registration restrictions, and per-zone bandwidth caps are configured by the appliance administrator and override default behavior.

Sources