Cisco Bug: CSCus71609 - nV Cluster drops multicast traffic around 20 seconds in fail-over
Jul 20, 2018
- Cisco ASR 9000 Series Aggregation Services Routers
Known Affected Releases
Symptom: When the primary DSC of a nV Cluster is powed off, the multicast traffic which is being forwarded on the bundle member interface on the primary DSC suffers from 15 to 20 seconds of packet drop. So far, this outage is found to be common to: - IPv4 Native Multicast - RSVP P2MP both for MVPN and VPLS - mLDP for MVPN As for the LSM case, 20 seconds of packet drop in chassis FO occurs when the nV cluster acts as pure-mid (transit label swap) or bud role (both disposition and label swap are affected). Conditions: ASR9K nV cluster is used for -IPv4 Multicast -MVPN P2MP -MVPN mLDP -VPLS-LSM - mGRE based MVPN , and nV cluster is connected with bundle-ethernet with adjacent routers. Multicast traffic is being forwarded in the primary DSC bundle member port as OIF. Fail-over is conducted by pimary DSC power-off.
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