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Beginner

Ask the Expert: Understanding, Configuring, and Troubleshooting

Ok....Make sense...thank you.

Beginner

Ask the Expert: Understanding, Configuring, and Troubleshooting

Can you confirm that it is possible to stack IP Services and IP Base switches in the same stack.

thanks

Cisco Employee

Ask the Expert: Understanding, Configuring, and Troubleshooting

All of the switches in the stack have to have the same license level

Q.

What are the license requirements for a Cisco Catalyst 3850 switch stack?

A. In a Cisco Catalyst 3850 stack, all switches should be at the same image-based license (IP Services/IPBase/LAN Base) level. The active switch license level is considered as the reference, and the member switch licenses are compared against it. If there is a mismatch, the active switch with the syslog message "license mismatch error" indicates that the stacking was unsuccessful.

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps12686/qa_c67-722110.html

Beginner

Ask the Expert: Understanding, Configuring, and Troubleshooting

Hello...the management interface on the 3850....is it just a layer -2 interface....or should i be able to route across segments to get to it?

Cisco Employee

Ask the Expert: Understanding, Configuring, and Troubleshooting

Kevin

The mgmt interface is in its own VRF and would be treated as a "host" interface. You cannot put it in a different VRF. The only configuration is an IP address

interface GigabitEthernet0/0

vrf forwarding Mgmt-vrf

ip address X.X.X.X X.X.X.X

no ip route-cache

negotiation auto

end

You would also need to create a default route for this VRF. Example:

ip route vrf Mgmt-vrf 0.0.0.0 0.0.0.0 Y.Y.Y.Y

If you wish to use this interface for copying TO the switch, you would need to configure the following. This will tell the switch to use this interface

ip ftp source-interface GigabitEthernet0/0

ip tftp source-interface GigabitEthernet0/0

The upstream device that this Gi0/0 is plugged into just needs to be configured as a switchport access vlan. Typically customers put this in their mgmt vlan that they have configured in their network to access their devices via ssh/telnet.

Let me know if you have further questions.

Beginner

Ask the Expert: Understanding, Configuring, and Troubleshooting

Hello

Hello we are also upgrading our campus 3750 switches with 3850….I want to know is there any big changes in trunking, etherchanneling, or portchanneling with this new IOS XE 3.3? any new particular steps.   Also can you point me to 3850 documentation for NetFlow, and NetFlow_v9.

Thanks-KDS

Cisco Employee

Ask the Expert: Understanding, Configuring, and Troubleshooting

Kevin


The biggest difference between thse three things (trunking, etherchanneling, port-channeling) is we only support Dot1Q now on the 3850 vs the 3750. ISL is gone. This is across all version for 3850, not specific to 3.3.0. I would also check out Luke's post above about QoS on the 3850 vs 3750 as we moved from MLS QoS to MQC QoS. This is a major change.

I would check out the "what's new" for 3.3.0 to get the newest feature as we did add some significant features improvements

http://www.cisco.com/en/US/docs/switches/lan/catalyst3850/software/release/3se/release_notes/OL_30562_01.html#wp342813

Below is the config guide for NetFlow. I started you off at the restrictions as we support flexible netflow on the 3850.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3850/software/release/3se/flexible_netflow/configuration_guide/b_fnf_3se_3850_cg_chapter_010.html#reference_C63398C01C7C41E1AEC2BCEE4915A909

Beginner

Ask the Expert: Understanding, Configuring, and Troubleshooting

Hi again guys,

Another question on this subject.  My SSIDs and Aps are configured, but why am I unable to see the SSID broadcasting?  thanks.

Evan

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Cisco Employee

Ask the Expert: Understanding, Configuring, and Troubleshooting

Hello Evan,

Thank you for the second question.  I like your interest in this new product and will be glad to help.

This can happen for a couple of reasons.  Start with the basic, are your APs connected and are the wireless networks on and the radios on the APs up?

Generally, when I see this issue popping up I see that the SSIDs are outside of the defaullt AP group called "default-group".  If your WLAN ID number is higher then WLAN ID 16, your SSIDs are not placed in the Default-Group and your SSIDs are not broadcasted.  There are 2 ways to correct this.  Rewrite your WLAN config to a WLAN ID between 1-16 or create an AP group and assign an AP to the new AP group.

Lets us know if you have any other questions.

Nick

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