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Configuring the Cisco Gigabit EtherSwitch EHWIC
Configuration Examples for Gigabit EtherSwitch EHWICs
87
Configuring the Cisco Gigabit EtherSwitch EHWIC
OL-23155-01
Note In a centralized CallManager deployment model, the DHCP server might be located across the WAN
link. If so, an ip helper-address command pointing to the DHCP server should be included on the voice
VLAN interface for the IP phone. This is done to obtain its IP address as well as the address of the TFTP
server required for its configuration.
Be aware that IOS supports a DHCP server function. If this function is used, the EtherSwitch EHWIC
serves as a local DHCP server and a helper address would not be required.
Inter-VLAN Routing: Example
Configuring inter-vlan routing is identical to the configuration on an EtherSwitch EHWIC with an
MSFC. Configuring an interface for WAN routing is consistent with other IOS platforms.
The following example provides a sample configuration:
interface Vlan 160
description voice vlan
ip address 10.6.1.1 255.255.255.0
interface Vlan 60
description data vlan
ip address 10.60.1.1 255.255.255.0
interface Serial0/3/0
ip address 160.3.1.2 255.255.255.0
Note Standard IGP routing protocols such as RIP, IGRP, EIGRP, and OSPF are supported on the EtherSwitch
EHWIC. Multicast routing is also supported for PIM dense mode, sparse mode and sparse-dense mode.
Single Subnet Configuration: Example
The EtherSwitch EHWIC supports the use of an 802.1p-only option when configuring the voice VLAN.
Using this option allows the IP phone to tag VoIP packets with a CoS of 5 on the native VLAN, while
all PC data traffic is sent untagged.
The following example shows a single subnet configuration for the EtherSwitch EHWIC:
Router#gigabitethernet 0/1/2
description Port to IP Phone in single subnet
switchport access vlan 40
The EtherSwitch EHWIC instructs the IP phone to generate an 802.1Q frame with a null VLAN ID value
but with an 802.1p value (default is COS of 5 for bearer traffic). The voice and data vlans are both 40 in
this example.
Ethernet Ports on IP Phones with Multiple Ports: Example
The following example illustrates the configuration for the IP phone:
interface GigabitEthernet0/x/x
switchport voice vlan x
switchport mode trunk
- Contents 1
- Configuring VLANs 4
- Verifying VLAN Deletion 7
- Configuring a VTP Server 8
- Configuring a VTP Client 9
- Verifying VTP 10
- Defining a Range Macro 11
- DETAILED STEPS 12
- SUMMARY STEPS 13
- Example: 18
- OL-23155-01 19
- Changing the Quiet Period 24
- Enabling Multiple Hosts 27
- Configuring Spanning Tree 29
- Enabling Spanning Tree 30
- Calculating Port Cost 32
- Configuring the Hello Time 34
- Configuring the Root Bridge 34
- Disabling Spanning Tree 35
- Configuring the Aging Timer 37
- Verifying the Aging Time 38
- Configuring the SPAN Sources 39
- Configuring SPAN Destinations 39
- Verifying the SPAN Session 39
- Configuring IGMP Snooping 45
- Configuring Fallback Bridging 52
- Creating a Bridge Group 53
- Changing the Switch Priority 58
- Assigning a Path Cost 59
- Adjusting BPDU Intervals 60
- Voice Traffic and VVID 66
- Adding Trap Managers 68
- Configuring IP Information 69
- Managing the ARP Table 73
- Configuring the Aging Time 74
- Removing Dynamic Addresses 75
- Adding Secure Addresses 76
- Configuring Static Addresses 77
- Clearing MAC Address Tables 78
- Configuring Port Security 78
- Range of Interface: Examples 79
- VLAN Configuration: Example 80
- Spanning Tree: Examples 81
- Hello Time: Example 82
- Spanning Tree Root: Example 83
- IGMP Snooping: Example 84
- Storm-Control: Example 86
- Ethernet Switching: Examples 86
- Inter-VLAN Routing: Example 87
- Additional References 88
- Technical Assistance 89
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