- Catalyst 3750-X and 3560-X Switch Software Configuration Guide, Cisco IOS 15.0(2)SE and Later
- Table of Contents
- Preface
- Overview
- Using the Command-Line Interface
- Configuring Cisco IOS Configuration Engine
- Assigning the Switch IP Address and Default Gateway
- Managing Switch Stacks
- Clustering Switches
- Administering the Switch
- Configuring SDM Templates
- Managing Catalyst 3750-X Stack Power
- Configuring Switch-Based Authentication
- Configuring IEEE 802.1x Port-Based Authentication
- Configuring MACsec Encryption
- Configuring Web-Based Authentication
- Configuring Cisco TrustSec
- Configuring Interface Characteristics
- Configuring VLANs
- Configuring VTP
- Configuring Voice VLANs
- Configuring Private VLANs
- Configuring IEEE 802.1Q and Layer 2 Protocol Tunneling
- Configuring STP
- Configuring MSTP
- Configuring Optional Spanning-Tree Features
- Configuring Resilient Ethernet Protocol
- Configuring Flex Links
- Configuring DHCP Features and IP Source Guard
- Configuring Dynamic ARP Inspection
- Configuring IGMP Snooping and MVR
- Configuring IPv6 MLD Snooping
- Configuring CDP
- Configuring Port-Based Traffic Control
- Configuring LLDP, LLDP-MED, and Wired Location Service
- Configuring UDLD
- Configuring SPAN and RSPAN
- Configuring RMON
- Configuring System Message Logging and Smart Logging
- Configuring SNMP
- Configuring Embedded Event Manager
- Configuring Network Security with ACLs
- Configuring QoS
- Configuring IPv6 ACLs
- Configuring EtherChannels and Link-State Tracking
- Configuring TelePresence E911 IP Phone Support
- Configuring IP Unicast Routing
- Configuring IPv6 Unicast Routing
- Configuring HSRP and VRRP
- Configuring Cisco IOS IP SLAs Operations
- Configuring Flexible NetFlow
- Configuring Enhanced Object Tracking
- Configuring WCCP
- Configuring IP Multicast Routing
- Implementing IPv6 Multicast
- Configuring MSDP
- Configuring Fallback Bridging
- Troubleshooting
- Configuring Online Diagnostics
- Working with the Cisco IOS File System, Configuration Files, and Software Images
- Unsupported Commands in Cisco IOS Release 15.0(2)SE
- Index
Configuring TelePresence E911 IP Phone Support
Unless otherwise noted, the term switch refers to a standalone switch and to a switch stack.
Note
This feature is not supported on switches running the LAN base feature set.
The Catalyst 3750-X and 3560-X switch command reference has command syntax and usage information.
Understanding TelePresence E911 IP Phone Support
You can use a Cisco IP phone as a user interface in a Cisco TelePresence System. See in Figure 1. In this configuration, the IP phone must always be on and available for emergency calls. If the power to the codec in the Cisco TelePresence System fails, is disrupted or if the codec fails, the IP phone is not available.
Figure 1-1 Phone-Codec-Switch Connection
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Use the TelePresence E911 IP phone support feature to ensure that the IP phone is always on and available for emergency calls. When a CDP-enabled IP phone is connected to the codec through a switch, you can configure the switch to forward CDP packets from the IP phone only to the codec in the Cisco TelePresence System. The switch adds ingress-egress port pairs to the CDP forwarding table. An ingress-egress port pair is a one-to-one mapping between an ingress switch port connected to the IP phone and an egress switch port connected to the codec.
The IP phone and the codec communicate through the IP network. If power to the codec fails, is disrupted or if the codec fails, the IP phone is still connected to the IP network and is available for emergency calls.
The switch forwards all CDP packets received on the ingress port to the egress port. If multiple IP phones are connected to the codec through a single port on the switch, only one phone communicates with it through the IP network. This phone is usually the one that sent the first CDP packet received by the codec.
Figure 1-2 Phone-Switch-Codec Connection
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Configuring TelePresence E911 IP Phone Support
Configuration Guidelines
Enabling TelePresence E911 IP Phone Support
Beginning in privileged EXEC mode:
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