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3Com 5500G-EI -- trust DSCP for Cisco VoIP phones

LostedMan
Occasional Advisor

3Com 5500G-EI -- trust DSCP for Cisco VoIP phones

Hi all.  We have retained a firm to install a Cisco VoIP solution to our enterprise, and the consultant has said that at very least, we need to have, in Cisco terms, "auto qos voip trust", "mls qos trust dscp", or the equivalent on the switch ports that service the IP phones, and the uplink trunk ports also need to trust the DSCP markings and pass them upstream.  We have one 5-switch IRF stack of 3Com 5500G-EI switches left over, and the previous admin put this pertinent config in.  What more do we need to do, to conform to the consultant's specs?

With the current config, the workstations can access VLAN 10, and the phones automatically access the voice VLAN of 5, so that part works with no problems.  Comware version is 3.03.02s168p23.

acl number 3997
 rule 0 permit ip dscp ef
 rule 1 permit tcp destination-port eq www
 rule 2 permit udp destination-port eq snmp
 rule 3 permit udp destination-port eq snmptrap
 rule 4 permit ip dscp cs6
 rule 5 permit ip dscp cs7
#
acl number 4999
 rule 0 permit type 8868 ffff
 rule 1 permit source 00e0-bb00-0000 ffff-ff00-0000
 rule 2 permit source 0003-6b00-0000 ffff-ff00-0000
 rule 3 permit source 00e0-7500-0000 ffff-ff00-0000
 rule 4 permit source 00d0-1e00-0000 ffff-ff00-0000
 rule 5 permit source 0001-e300-0000 ffff-ff00-0000
 rule 6 permit source 000f-e200-0000 ffff-ff00-0000
 rule 7 permit source 0060-b900-0000 ffff-ff00-0000
 rule 8 permit source 005f-8600-0000 ffff-ff00-0000
 rule 9 permit source 009e-1e00-0000 ffff-ff00-0000
 rule 10 permit source 00eb-d500-0000 ffff-ff00-0000
 rule 11 permit source 5006-ab00-0000 ffff-ff00-0000
 rule 12 permit source 94d4-6900-0000 ffff-ff00-0000
 rule 13 permit source ac44-f200-0000 ffff-ff00-0000
 rule 14 deny dest 0000-0000-0000 ffff-ffff-ffff
#
acl number 4999
 rule 0 permit type 8868 ffff
 rule 1 permit source 00e0-bb00-0000 ffff-ff00-0000
 rule 2 permit source 0003-6b00-0000 ffff-ff00-0000
 rule 3 permit source 00e0-7500-0000 ffff-ff00-0000
 rule 4 permit source 00d0-1e00-0000 ffff-ff00-0000
 rule 5 permit source 0001-e300-0000 ffff-ff00-0000
 rule 6 permit source 000f-e200-0000 ffff-ff00-0000
 rule 7 permit source 0060-b900-0000 ffff-ff00-0000
 rule 8 deny dest 0000-0000-0000 ffff-ffff-ffff
#
qos-profile default
 packet-filter inbound link-group 4999 rule 8
 traffic-priority inbound ip-group 3997 rule 0 cos voice
 traffic-priority inbound ip-group 3997 rule 4 cos network-management
 traffic-priority inbound ip-group 3997 rule 5 cos network-management
 traffic-priority inbound link-group 4999 rule 0 dscp ef cos voice
 traffic-priority inbound link-group 4999 rule 1 dscp ef cos voice
 traffic-priority inbound link-group 4999 rule 2 dscp ef cos voice
 traffic-priority inbound link-group 4999 rule 3 dscp ef cos voice
 traffic-priority inbound link-group 4999 rule 4 dscp ef cos voice
 traffic-priority inbound link-group 4999 rule 5 dscp ef cos voice
 traffic-priority inbound link-group 4999 rule 6 dscp ef cos voice
 traffic-priority inbound link-group 4999 rule 7 dscp ef cos voice
#
qos-profile voipphones
 packet-filter inbound link-group 4998 rule 14
 traffic-priority inbound ip-group 3997 rule 0 cos voice
 traffic-priority inbound ip-group 3997 rule 4 cos network-management
 traffic-priority inbound ip-group 3997 rule 5 cos network-management
 traffic-priority inbound link-group 4998 rule 0 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 1 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 2 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 3 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 4 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 5 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 6 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 7 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 8 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 9 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 10 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 11 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 12 dscp ef cos voice
 traffic-priority inbound link-group 4998 rule 13 dscp ef cos voice
#
 voice vlan aging 100
 voice vlan mac-address 005f-8600-0000 mask ffff-ff00-0000 description CiscoPhoneCustom1
 voice vlan mac-address 009e-1e00-0000 mask ffff-ff00-0000 description CiscoPhoneCustom2
 voice vlan mac-address 00eb-d500-0000 mask ffff-ff00-0000 description CiscoPhoneCustom3
 voice vlan mac-address 5006-ab00-0000 mask ffff-ff00-0000 description CiscoPhoneCustom4
 voice vlan mac-address 94d4-6900-0000 mask ffff-ff00-0000 description CiscoPhoneCustom5
 voice vlan mac-address ac44-f200-0000 mask ffff-ff00-0000 description CiscoPhoneCustom6
#
 voice vlan 5 enable
#
interface GigabitEthernet1/0/1
 poe enable
 stp edged-port enable
 port link-type hybrid
 port hybrid vlan 1  10 untagged
 port hybrid pvid vlan 10
 broadcast-suppression pps 3000
 undo jumboframe enable
 voice vlan enable
 voice vlan legacy
 loopback-detection enable
 description \\ APD Dept //
 apply qos-profile voipphones
#
interface TenGigabitEthernet1/1/1
 port link-type trunk
 port trunk permit vlan all
 broadcast-suppression pps 3000
 undo jumboframe enable
 gvrp
 lacp enable

 

1 REPLY
LostedMan
Occasional Advisor

Re: 3Com 5500G-EI -- trust DSCP for Cisco VoIP phones

Some research turned up this forum post: https://community.hpe.com/t5/Comware-Based/Trust-DSCP-on-3Com-5500/td-p/6689664

That suggested that the interface command "priority trust" would do the job.  To test, I issued that command on one port and then checked the config of the port.  The command does not show up in the config, which suggests that this command is the default configuration on ports.  Can anyone verify this?