Enabling Prioritization for Legacy Voice over IP
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Configuring a VLAN for Voice Clients
MSS requires all clients to be authenticated by RADIUS or the local
database, and to be authorized for a specific VLAN. MSS places the user
in the authorized VLAN.
Configure a VLAN for voice clients
You can use the same VLAN for other clients. However, it is a best
practice to use the VLAN primarily, if not exclusively, for voice traffic.
Disable IGMP snooping in the VLAN. (Disabling this feature is required
for SVP.)
To configure a VLAN and a last-resort user for the voice SSID:
WX4400#
set vlan 2 name v1 port 3
WX4400#
set igmp disable vlan v1
The
set vlan
and
set igmp
commands create VLAN
v1
and add the
uplink port to it, then disable IGMP snooping in the VLAN.
Configuring an ACL to Prioritize Voice Traffic
MSS does not provide priority forwarding for SVP traffic by default. To
enable prioritization for SVP traffic, you must configure an ACL and map
it to the both the inbound and outbound directions of the VLAN to which
the voice clients are assigned. The ACL must contain an ACE that
matches on IP protocol 119 and marks the IP ToS bits in matching packets
with CoS value 7. When a MAP receives a packet with CoS value 7, the
MAP places the packet in the voice queue for priority forwarding.
If the VLAN will be shared by other clients, you also need to add an ACE
that permits the traffic that is not using IP protocol 119. Otherwise, the
WX drops this traffic. Every ACL has an implicit ACE at the end that
denies all traffic that does not match any of the other ACEs in the ACL.
After you configure the ACE and map it to the VLAN, you must commit
the VLAN to the configuration. The ACL does not take effect until you
map it and commit it.
The following commands configure an ACE to prioritize SVP traffic and
map the ACE to the outbound direction of the voice VLAN:
WX1200#
set security acl ip SVP permit cos 7 udp 10.2.4.69
255.255.255.255 gt 0 any gt 0
Summary of Contents for 3CRWX120695A
Page 138: ...138 CHAPTER 6 CONFIGURING AND MANAGING IP INTERFACES AND SERVICES ...
Page 272: ...272 CHAPTER 11 CONFIGURING RF LOAD BALANCING FOR MAPS ...
Page 310: ...310 CHAPTER 13 CONFIGURING USER ENCRYPTION ...
Page 322: ...322 CHAPTER 14 CONFIGURING RF AUTO TUNING ...
Page 350: ...350 CHAPTER 16 CONFIGURING QUALITY OF SERVICE ...
Page 368: ...368 CHAPTER 17 CONFIGURING AND MANAGING SPANNING TREE PROTOCOL ...
Page 412: ...412 CHAPTER 19 CONFIGURING AND MANAGING SECURITY ACLS ...
Page 518: ...518 CHAPTER 21 CONFIGURING AAA FOR NETWORK USERS ...
Page 530: ...530 CHAPTER 22 CONFIGURING COMMUNICATION WITH RADIUS ...
Page 542: ...542 CHAPTER 23 MANAGING 802 1X ON THE WX SWITCH ...
Page 598: ...598 CHAPTER 26 ROGUE DETECTION AND COUNTERMEASURES ...
Page 706: ...706 GLOSSARY ...