08-14-2013 10:10 AM - edited 03-07-2019 02:56 PM
All,
I am configuring a stack of new Cisco 3850's. In the past, we have always used 3750's with the switchport command "mls qos trust dscp" for the purpose of trusting markings sent across from our VOIP phones. This is not an option on IOS-XE so I am wondering, what is the equivalent of this command? Is there a default behavior that antiquates manual config?
~Josh
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08-14-2013 10:22 AM
Hi,
On the 3850 series the trust is done by default;
Cisco Catalyst 3850 Trust Behavior
The trust behavior on the Cisco Catalyst 3850 has changed from the that of Cisco Catalyst 3K Series switches. By default, the Cisco Catalyst 3850 trusts markings on the wired ports. For wired ports, differentiated services code point (DSCP) markings in IP packets from endpoints such as IP phones, telepresence units, cameras, and laptops are trusted and retained.
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps12686/guide_c07-727066.pdf
HTH
08-14-2013 10:22 AM
Hi,
On the 3850 series the trust is done by default;
Cisco Catalyst 3850 Trust Behavior
The trust behavior on the Cisco Catalyst 3850 has changed from the that of Cisco Catalyst 3K Series switches. By default, the Cisco Catalyst 3850 trusts markings on the wired ports. For wired ports, differentiated services code point (DSCP) markings in IP packets from endpoints such as IP phones, telepresence units, cameras, and laptops are trusted and retained.
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps12686/guide_c07-727066.pdf
HTH
08-14-2013 11:26 AM
Thanks Reza!
09-18-2013 09:22 PM
Reza, I am in the same situation. What about these switchport commands that we have used on the 3750X:
switchport priority extend trust
switchport voice detect cisco-phone
mls qos trust device cisco-phone
This is what we have:
License Level: Ipbase
License Type: Permanent
Next reload license Level: Ipbase
cisco WS-C3850-48P (MIPS) processor with 4194304K bytes of physical memory.
Processor board ID FOC1731U08M
2 Virtual Ethernet interfaces
52 Gigabit Ethernet interfaces
4 Ten Gigabit Ethernet interfaces
2048K bytes of non-volatile configuration memory.
4194304K bytes of physical memory.
250456K bytes of Crash Files at crashinfo:.
1609272K bytes of Flash at flash:.
0K bytes of Dummy USB Flash at usbflash0:.
0K bytes of at webui:.
Base Ethernet MAC Address : 7c:95:f3:5b:08:00
Motherboard Assembly Number : 73-14442-08
Motherboard Serial Number : FOC17304YEM
Model Revision Number : G0
Motherboard Revision Number : B0
Model Number : WS-C3850-48P
System Serial Number : FOC1731U08M
Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
1 56 WS-C3850-48P 03.02.02.SE cat3k_caa-universalk9 INSTALL
Configuration register is 0x102
-#- --length-- ---------date/time--------- path
2 2097152 Sep 18 2013 10:57:06 +00:00 nvram_config
3 74369252 Aug 12 2013 10:03:15 +00:00 cat3k_caa-base.SPA.03.02.02.SE.pkg
4 5808828 Aug 12 2013 10:03:16 +00:00 cat3k_caa-drivers.SPA.03.02.02.SE.pkg
5 32488292 Aug 12 2013 10:03:15 +00:00 cat3k_caa-infra.SPA.03.02.02.SE.pkg
6 30403764 Aug 12 2013 10:03:16 +00:00 cat3k_caa-iosd-universalk9.SPA.150-1.EX2.pkg
7 16079584 Aug 12 2013 10:03:15 +00:00 cat3k_caa-platform.SPA.03.02.02.SE.pkg
8 64580300 Aug 12 2013 10:03:16 +00:00 cat3k_caa-wcm.SPA.10.0.111.0.pkg
9 1224 Aug 12 2013 10:03:26 +00:00 packages.conf
10 616 Sep 18 2013 09:54:39 +00:00 vlan.dat
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