From: Jason Cash (cash2001@swbell.net)
Date: Mon Jul 14 2003 - 17:14:55 GMT-3
I am working on IPE Section 36 and the Advanced 3550 section instructs:
IP Phone - 1 will be on VLAN 101 & connecting device to IP Phone will be on
VLAN
102. IP Phone will be using 802.1Q encapsulation.
IP Phone - 2 will be on VLAN201 & connecting device to IP Phone will be on
VLAN202. FastEthernet0/12 will be statically configured to 802.1Q trunking
mode
for IP Phone-2 connectivity.
The solution is provided as such:
interface FastEthernet0/11
switchport access vlan 102
switchport voice vlan 101
switchport trunk encapsulation dot1q
switchport priority extend cos 0
no ip address
mls qos cos 1
mls qos cos override
spanning-tree portfast
!
interface FastEthernet0/12
switchport trunk encapsulation dot1q
switchport trunk native vlan 202
switchport mode trunk
switchport voice vlan 201
no ip address
spanning-tree portfast
I understand the commands entered now, but that still does not explain how
the values were arrive at. In particular the '1' in 'mls qos cos 1'. I
take this to be that the CoS value is set to 1 on all incoming packet to the
interface, but why 1? Can someone provide me with a ToS/ CoS/DSCP chart?
Also, it seems that the same instruction is given for IP Phone 2, but the
config is not identical. Any explanations are appreciated
This archive was generated by hypermail 2.1.4 : Wed Aug 06 2003 - 06:52:39 GMT-3