We have an Alcatel VoIP telephony platform, the handsets connect to switch ports configured as Trunk ports, with a dedicated Voice VLAN for the voice traffic. The VoIP Handsets have a LAN interface to which the PC connects, the PC traffic is then carried over the native vlan on the trunk.
We are running Rapid PVST (RSTP) but everytime there is a topology change the PC/Phones lose conenctivity for the duration of tranditional 802.1d Spanning Tree. We cannot enable portfast on the switch ports because they are trunk ports, even if we enable portfast it will not be active becuase the port is trunking, so the trunk port to the phone is seen as a STP P2P type port and not an Edge Type port. When a topology change occurs it tries to use RSTP to synchronise but the VoIP phone does not undestand RSTP so it falls back to STP timers, taking apx 50 seconds to transist back to a forwarding state. This causes the phones to reset etc. and an extended outage for the end user.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...