Catalyst 3850 vs Nexus 3K

Hi ,
I have a question. If the only requirement for the DC is to have iSCSI for some servers , is it better to go for Nexus 3K or I should choose Cat 3850. Apparently with 10 gig uplinks Cat 3850 is more expensive. Can someone plz tell what would be the benefits of each in this scenario?
Fawad

Hi ,
Cat 3850 is mainly used for unify wired and wireless networks. Cisco Catalyst 3850 Switches, which combine wired and wireless by supporting wireless tunnel termination and full wireless LAN controller functionality.
In other hand , Nexus 3000 is datacenter top of the rack switch and low latency , unify data ad storage switch and well suited for your Iscsi requirement . so i would suggest nexus 3000 .
HTH
Regards,
VS.Suresh.
*Plz rate the usefull posts *

Similar Messages

Catalyst 3850 Stack VLANs, layer 2 vs. layer 3 design question

Hello there:
Just a generic, design question, after doing much reading, I am just not clear as when to use one or the other, and what the benefits/tradeoffs are:
Should we configure the switch stack w/ layer 3, or layer 2 VLANs?
We have a Catalyst 3850 Stack, connected to an ASA-X 5545 firewall via 8GB etherchannel.
We have about 100 servers (some connected w/ bonding or mini-etherchannels), and 30 VLANs.
We have several 10GB connections to servers.
We push large, (up to) TB sized files from VLAN to VLAN, mostly using scp.
No ip phones, no POE.
Inter-VLAN connectivity/throughput and security are priorities.
Originally, we planned to use the ASA to filter connections between VLANs, and VACLs or PACLs on the switch stack to filter connections between hosts w/in the same VLAN.
Thank you.

If all of your servers are going to the 3850 then I'd say you've got the wrong switch model to do DC job. If you don't configure QoS properly, then your servers will start dropping packets because Catalyst switches have very, very shallow memory buffers. These memory buffers get swamped when servers do non-stop traffic.
Ideally, Cisco recommends the Nexus solution to connect servers to. One of the guys here, Joseph, regularly recommends the Catalyst 4500-X as a suitable (and financial) alternative to the more expensive Nexus range.
In a DC environment, if you have a lot of VM stuff, then stick with Layer 2. V-Motion and Layer 3 don't go hand-in-hand.

Converged Access Design Help (Catalyst 3850 and WLC 5508...Mobility Oracle)

Hello,
I am an engineer working with a Cisco Gold Partner in Saudi Arabia. We have a large university as our client where they are constructing a new
building and require our services to build the network infrastructure. Therefore, we are to implement the routing and switching infrastructure as
well as the Wireless solution.
At present, I have no issues in implementing the R&S infrastructure as it is very straight forward but it has implications on the deployment of
the wireless solution which I explain further below. The R&S infrastructure comprises of the typical Core, Distribution, and Access layers and we
are focusing on the local distribution and access switches with regards to the new building. The client has a converged Layer 3 network spanning
from distribution layer to core layer and they are running EIGRP for this convergence. This is not a problem and has already been implemented.
Yet, the challenge arises in deploying the WLAN infrastructure. The client already has a Cisco WLAN infrastructure in place where they have a
large number of LAPs that are registered with their controllers in the Data Center. They have two WLC 5508 where one is the Primary and the other
the Secondary. The local distribution switch to which the WLC are connected also is the gateway for the SVIs for the SSIDs that are configured on
the controllers. This means that once the packets from the AP come in to the WLC, they are tagged with the correct VLAN and sent to the directly
connected distribution switch which then routes it into the rest of the Layer 3 network. Interestingly, the WLC 5508 are running AireOS 7.6 and
support the "New Mobility" feature. The two controllers have formed a Mobility Group (MG) between each other.
Now, the new building will have two Catalyst 3850 switches installed where each one has a total of 40 AP licenses pre-installed and activated
i.e. a total of 80 APs can be supported by the two switches. A total of 67 LAPs will be deployed in the new building which can be accommodated
between the two switches and their integrated controller.
Yet, based on my understanding and research about Converged Access is that, ideally, the Catalyst 3850 will only run the Mobility Agent (MA)
feature while a central controller would provide the Mobility Controller (MC) service. unfortunately, there are not enough licenses on the
existing WLC 5508 nor can we migrate the new licenses that will facilitate such a split deployment.
This means that I would need to configure the two Catalyst 3850 as independent MC and form a MG between them. I have done this and tested this
already and the mobility is working fine. But my concern is not about getting the Catalyst 3850 to work as this is simple but rather it is
focused on creating a common Mobility Domain (MD) so that clients can roam from this new building to the rest of the campus while maintaining the
state of their connections to the WLAN infrastructure.
To make things more complicated, since the new building will have its own Layer 3 distribution switch and the Catalyst 3850 switches will connect
to this distribution switch, it means that new VLANs and SVIs need to be created for the SSIDs broadcast in the new building. This means that new
subnets need to be assigned to the SSIDs.
As such, I have the following questions:
Q1) If we create new SVIs for the SSIDs (same SSIDs names will be used in the new building as in the rest of the university campus) this means
that new subnets will be assigned to these SSIDs. Now, I believe I have two options...one is to make the new Catalyst 3850s to be in the same MG
as the existing WLC 5508 which then cater for Layer 3 client roaming or I have to treat this as a totally seperate WLAN network and follow on to
the solution as per the next question. Please advise which is a better option?
Q2) I could create separate MG i.e. the new building Catalyst 3850s can be in one MG and the existing controllers can be in another MG. I can
then have one of the existing WLC 5508 (the primary one) to run the Mobility Oracle (MO) feature so as to create a single Mobility Domain (MD).
Would this facilitate in Layer 3 client roaming and RRM for all the controllers in the same MD?
Q3) If I do create a MD, how is this accomplished in such an environment since the documentation is severely limited in this regard?
Please advise at your earliest. To assist further, I have attached a topology diagram which may aid in explaining the situation with more
clarity. If these things are clarified, I will be better able to wrap my head around the technology and in turn service my clients better.
Regards,
Amir

Hi Amir,
Q1) If we create new SVIs for the SSIDs (same SSIDs names will be used in the new building as in the rest of the university campus) this means that new subnets will be assigned to these SSIDs. Now, I believe I have two options...one is to make the new Catalyst 3850s to be in the same MG as the existing WLC 5508 which then cater for Layer 3 client roaming or I have to treat this as a totally seperate WLAN network and follow on to the solution as per the next question. Please advise which is a better option?
I would configure them in the same mobility group. Also configure same SPG for those two 3850 stacks if users are frequently roaming within these two buildings.
Q2) I could create separate MG i.e. the new building Catalyst 3850s can be in one MG and the existing controllers can be in another MG. I can then have one of the existing WLC 5508 (the primary one) to run the Mobility Oracle (MO) feature so as to create a single Mobility Domain (MD). Would this facilitate in Layer 3 client roaming and RRM for all the controllers in the same MD?
MO is not required (it is only for very large scale deployments)
Q3) If I do create a MD, how is this accomplished in such an environment since the documentation is severely limited in this regard?
Yes, documents are hard to find :(
These notes may be useful to you based on my experience. I am running IOS-XE 3.6.1 in my production.
http://mrncciew.com/2014/05/06/configuring-new-mobility/
http://mrncciew.com/2013/12/14/3850ma-with-5760mc/
HTH
Rasika
*** Pls rate all useful responses ****

Cisco Catalyst 3850 as ntp master

Hi All,
I have 2 x Cisco Catalyst 3850 stacked together. What are your recommendations if I use the C3850 as a ntp master for all edge switches connected in my network? All edge switches must be authenticated if it needs NTP sychronization. But other than that, what are the downsides?
For example,
1. I heard that switches do not have an internal clock so is a poor device to be a centralized NTP master.
2. I have also read that switches also have slow CPU processors that may lack the processing required.
3. Its NTP sychronization will use external NTP servers which are resolved into IP addresses (e.g. pool.ntp.org). IP address can change. What other more reliable NTP sources are there?
4. Any other thoughts and comments are most welcome.

Firstly, DO NOT use the command "ntp master". Cisco do not recommend using this commands because this will confuse the NTP propagation inside the network.
Next, all Cisco devices do not have a dedicated clock. All appliances need to get SNTP/NTP time synch from somewhere. This "somewhere" could either be a dedicated GPS-based NTP server and/or a time synch somewhere out in the internet.
You can also use the command "ntp update-calendar". This new command allows appliances to take regular "snapshot" of the time and save it into the NVRAM. In case there was a reboot or a power failure, the appliance's time is not too far away instead of waiting 5 to 10 minutes for SNTP/NTP to synch.

Distributed multicast routing command not working on Catalyst 3850 switch

Hi Cisco community,
I was wondering if there is a known problem as to why the ip multicast-routing [distributed] option is not available on the Cat 3850 platforms
global command " ip multicast-routing " is accepted
the configuration guide named:
IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3SE (Catalyst 3850 Switches)
First Published: January 29, 2013
Last Modified: October 22, 2013
explains that this option "key word" [distributed] should be available>
Enables IP multicast routing.
ip multicast-routing [distributed]
Device(config)# ip multicast-routing distributed
=============== Here is what i have and see =========
Config attempt
============
CAT-3850-1(config)#ip multicast-routing distributed
^
Show command:
========
CAT-3850-1#show ip multicast
Multicast Routing: enabled
Multicast Multipath: disabled
Multicast Route limit: No limit
Multicast Fallback group mode: Sparse
Number of multicast boundaries configured with filter-autorp option: 0
Software:
========
Cisco IOS Software, IOS-XE Software, Catalyst L3 Switch Software (CAT3K_CAA-UNIVERSALK9-M),
Version 03.03.03SE RELEASE SOFTWARE (fc2)
License rights:
============
CAT-3850-1#sh license right-to-use
Slot# License name Type Count Period left
1 ipservices permanent N/A Lifetime
1 apcount adder 10 Lifetime
License Level on Reboot: ipservices
Slot# License name Type Count Period left
2 ipservices permanent N/A Lifetime
2 apcount adder 10 Lifetime
License Level on Reboot: ipservices
Any hints and help would be greately appreciated.
Many thanks in advance
Markus

Hi Reza,
Thank you for your quick reply, and for putting the record staright. As such, a helpful rating was provided
PS: Feel free to help me one more time if you happend to know folllow on this query :)>
I guess that the disributed function has been included in the standard mulitcast routing command because the key word is no longer needed. Or perhaps this platform does not support this at all.#
Once again , thank you for your help above.
Best regards

About Catalyst 3850 Wireless Multicast

Hello
i'm testing for catalyst 3850 wireless multicast, and i've tried several configurations but it's always fault. I took a pc with the wired as the multicast video source, and another pc as the receiver with wireless, the two pc in the same vlan, for example, vlan 10. the followed is the detail configuration about 3850.
<omitted>
ip routing
ip multicast-routing
ip multicast auto-enable
ip igmp snooping querier
interface Vlan6 ------The Access Point Vlan and it's the same vlan as wireless management vlan
description TO-Wireless_AP
ip address 192.168.6.254 255.255.255.0
ip pim sparse-dense-mode
interface Vlan10 ----The video source vlan and the wireless receiver client vlan.
description TO-EXSi
ip address 192.168.10.254 255.255.255.0
ip pim sparse-dense-mode
wireless mobility controller
wireless management interface Vlan6
wireless multicast
wlan VideoStream 3 VideoStream
client vlan 10
no security wpa
no security wpa akm dot1x
no security wpa wpa2
no security wpa wpa2 ciphers aes
no shutdown
ap capwap multicast 239.100.1.1
<omitted>
The video multicast group address is 239.100.1.1, here are some show command results.
show ip mroute
(*, 239.100.1.1), 00:01:13/stopped, RP 10.1.1.1, flags: SPF
Incoming interface: GigabitEthernet1/0/1, RPF nbr 10.0.0.2
Outgoing interface list: Null
(192.168.10.6, 239.100.1.1), 00:01:13/00:01:46, flags: PFT
Incoming interface: Vlan10, RPF nbr 0.0.0.0
Outgoing interface list: Null
(*, 239.255.255.250), 01:21:59/00:02:05, RP 10.1.1.1, flags: SJC
Incoming interface: GigabitEthernet1/0/1, RPF nbr 10.0.0.2
Outgoing interface list:
Vlan5, Forward/Sparse-Dense, 01:21:59/00:02:05
(*, 224.0.1.40), 01:21:59/00:02:02, RP 10.1.1.1, flags: SJCL
Incoming interface: GigabitEthernet1/0/1, RPF nbr 10.0.0.2
Outgoing interface list:
Vlan5, Forward/Sparse-Dense, 01:21:59/00:02:02
show ip igmp snooping wireless mgid
Total number of L2-MGIDs = 3
Total number of MCAST MGIDs = 0
Wireless multicast is Enabled in the system
Vlan bcast nonip-mcast mcast mDNS-br mgid Stdby Flags
1 Disabled Disabled Enabled Enabled Disabled 0:0:1:0
5 Disabled Disabled Enabled Enabled Disabled 0:0:1:0
6 Disabled Disabled Enabled Enabled Disabled 0:0:1:0
7 Disabled Disabled Enabled Enabled Enabled 0:0:1:0
8 Disabled Disabled Enabled Enabled Enabled 0:0:1:0
9 Disabled Disabled Enabled Enabled Disabled 0:0:1:0
10 Disabled Disabled Enabled Enabled Enabled 0:0:1:0
1002 Enabled Enabled Enabled Enabled Disabled 0:0:1:0
1003 Enabled Enabled Enabled Enabled Disabled 0:0:1:0
1004 Enabled Enabled Enabled Enabled Disabled 0:0:1:0
1005 Enabled Enabled Enabled Enabled Disabled 0:0:1:0
Index MGID (S, G, V)
The C3850 software version is Version 03.03.03SE RELEASE SOFTWARE (fc2), and i've tried the Version 03.02.02SE, it's the same result. if the multicast not worked, i can't do the Videostream function demo next step.

if video multicast group is 239.100.1.1, then same group cannot be configured for AP mcast -mcast mode communication.
Try this:
config t
no ap capwap multicast 239.100.1.1
ap capwap multicast 239.10.10.10
regards,
sudha

Disabling Catalyst 3850 Stack Discovery?

At Cisco Live! 2013 Orlando a mention was made which I understood to mean that by turning off the stacking ports of a Catalyst 3850 the switch would not wait for stack discovery but proceed with the boot sequence (by virtue of knowing the topology i.e. no other switches).
However, if I issue
switch 1 stack port 1 disable
switch 1 stack port 2 disable
save the config and do a reboot, the switch still sits for a long time just before the stack discovery completion messages, and boots no faster than a default out-of-the-box switch. Did I misunderstand, or is there some other command to tell the switch to not bother with stack discovery?

Here is a late reply:
It doesn't disable it completely:
When a stack port is flapping and causing instability in the stack, be careful when using the switch stack-member-number stack port port-number disable privileged EXEC command. When you disable the stack port, the stack operates at half bandwidth.

Catalyst 3850 QoS police

Hello,
Here is the config for Catalyst 3560 found under the link below.
I would like to do same setting on Catalyst 3850.
http://itknowledgeexchange.techtarget.com/network-engineering-journey/how-to-configure-per-vlan-qos-in-cisco-3550-and-3560/
mls qos
interface fa0/2
mls qos vlan-based
class-map INT
match input-interface fa0/2
policy-map NESTED_POLICE
class INT
policy 12800 1600 exceed-action drop
class-map HTTP
match protocol http
policy-map PARENT_MARK
class HTTP
set dscp af11
service-policy NESTED_POLICE
interface vlan 10
service-policy input PARENT_MARK
But commands like "mls qos", "mls qos vlan-based" and "match input-interface " doesn't work on 3850.
There is no helpful Cisco manual for it.
Could anyone help me?
Thanks in advance,
Taro

Hello Paul,
Thank you for the attention.
Here is the information.
#sh ver
Cisco IOS Software, IOS-XE Software, Catalyst L3 Switch Software (CAT3K_CAA-UNIVERSALK9-M), Version 03.02.01.SE RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2013 by Cisco Systems, Inc.
Compiled Wed 20-Mar-13 17:10 by prod_rel_team
Cisco IOS-XE software, Copyright (c) 2005-2013 by cisco Systems, Inc.
All rights reserved. Certain components of Cisco IOS-XE software are
licensed under the GNU General Public License ("GPL") Version 2.0. The
software code licensed under GPL Version 2.0 is free software that comes
with ABSOLUTELY NO WARRANTY. You can redistribute and/or modify such
GPL code under the terms of GPL Version 2.0.
(http://www.gnu.org/licenses/gpl-2.0.html) For more details, see the
documentation or "License Notice" file accompanying the IOS-XE software,
or the applicable URL provided on the flyer accompanying the IOS-XE
software.
ROM: IOS-XE ROMMON
BOOTLDR: C3850 Boot Loader (C3850-HBOOT-M) Version 1.1, RELEASE SOFTWARE (P)
SW01 uptime is 21 weeks, 6 days, 14 hours, 27 minutes
Uptime for this control processor is 21 weeks, 6 days, 14 hours, 30 minutes
System returned to ROM by reload at 22:27:58 JST Wed Jan 8 2014
System restarted at 22:27:52 JST Wed Jan 8 2014
System image file is "flash:packages.conf"
Last reload reason: Reload command
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
[email protected].
License Level: Ipservices
License Type: Permanent
Next reload license Level: Ipservices
cisco WS-C3850-24T (MIPS) processor with 4194304K bytes of physical memory.
Processor board ID FOC1717V01B
24 Virtual Ethernet interfaces
56 Gigabit Ethernet interfaces
8 Ten Gigabit Ethernet interfaces
2048K bytes of non-volatile configuration memory.
4194304K bytes of physical memory.
250456K bytes of Crash Files at crashinfo:.
250456K bytes of Crash Files at crashinfo-2:.
1609272K bytes of Flash at flash:.
1609272K bytes of Flash at flash-2:.
0K bytes of Dummy USB Flash at usbflash0:.
0K bytes of Dummy USB Flash at usbflash0-2:.
0K bytes of at webui:.
Base Ethernet MAC Address          : 44:ad:d9:6d:4e:00
Motherboard Assembly Number        : 73-12238-06
Motherboard Serial Number          : FOC17163HB8
Model Revision Number              : B0
Motherboard Revision Number        : D0
Model Number                       : WS-C3850-24T
System Serial Number               : FOC1717V01B
Switch Ports Model              SW Version        SW Image              Mode
     1 32    WS-C3850-24T       03.02.01.SE       cat3k_caa-universalk9 INSTALL
     2 32    WS-C3850-24T       03.02.01.SE       cat3k_caa-universalk9 INSTALL
Switch 02
Switch uptime                      : 21 weeks, 6 days, 14 hours, 31 minutes
Base Ethernet MAC Address          : 20:bb:c0:01:86:80
Motherboard Assembly Number        : 73-12238-06
Motherboard Serial Number          : FOC17163HCM
Model Revision Number              : B0
Motherboard Revision Number        : D0
Model Number                       : WS-C3850-24T
System Serial Number               : FOC1717V01K
Configuration register is 0x102
SW01#sh sdm prefer
Showing SDM Template Info
This is the Advanced template.
Number of VLANs:                                 4094
Unicast MAC addresses:                           32768
Overflow Unicast MAC addresses:                  512
IGMP and Multicast groups:                       8192
Overflow IGMP and Multicast groups:              512
Directly connected routes:                       32768
Indirect routes:                                 8192
Security Access Control Entries:                 3072
QoS Access Control Entries:                      2816
Policy Based Routing ACEs:                       1024
Netflow ACEs:                                    1024
Input Microflow policer ACEs:                    256
Output Microflow policer ACEs:                   256
Flow SPAN ACEs:                                  256
Tunnels:                                         256
Control Plane Entries:                           512
Input Netflow flows:                             8192
Output Netflow flows:                            16384
These numbers are typical for L2 and IPv4 features.
Some features such as IPv6, use up double the entry size;
so only half as many entries can be created.

Catalyst 3850 rack mount kit: 3850-RACK-KIT or C3850-4PT-KIT ?

When purchasing a Cisco Catalyst 3850, do we need to buy the rack mounting kit to install it in a standard 19" rack? 3850-RACK-KIT or C3850-4PT-KIT ? Is the 4-point kit really necessary, can the 3850 hang only on the front of the rack?

No, you don't need the C3850-4PT-KIT. 3850-RACK-KIT comes in the box and it is good enough as long as you rack it nice and tide. The reason some people use C3850-4PT-KIT is because the switch will hang from the back a little when using 3850-RACK-KIT and so if you don't like that than you want the 4PT.
HTH

How many Cisco Catalyst 3850 switches can make up a Cisco StackPower stack?

I know the number of Cisco 3850 switches for stacking is 9, so, if I make up a Cisco StackPower stack, MAX is 9, too?

Hi, emma, only 4 switches can become part of the same Cisco StackPower stack in a ring topology.
For the Cisco 3850 switches stack number,there are two types:
Up to 9 Cisco Catalyst 3850 switches can be stacked together to build single logical StackWise-480 switch since Cisco IOS XE Release 3.3.0SE. Prior to Cisco IOS XE Release3.3.0SE, up to 4 Cisco Catalyst 3850 switches could be stacked together.

Cisco Catalyst 3850 switches

How many Cisco Catalyst 3850 switches can stack into a single logical entity?

Hi, emma, only 4 switches can become part of the same Cisco StackPower stack in a ring topology.
For the Cisco 3850 switches stack number,there are two types:
Up to 9 Cisco Catalyst 3850 switches can be stacked together to build single logical StackWise-480 switch since Cisco IOS XE Release 3.3.0SE. Prior to Cisco IOS XE Release3.3.0SE, up to 4 Cisco Catalyst 3850 switches could be stacked together.

Catalyst 3850 Stack - 10G Modules

I have installed a (3) switch stack of Catalyst 3850 switches. I installed a 10G module in the 1st switch (the master) configured it and plugged it into the network and all works fine. Now I would like to add a second 10 Gigabit Ethernet connection to the stack in a channel group. When I install the 10G module into the standby switch (switch 3) I can do a "show inventory" and the 10G module is there. I can configure TenGigabitEthernet 3/1/3 and do a show run interface TenGigabitEthernet 3/1/3 all looks normal, but when I do a "show interface status" it is not listed and I cannot get the interface to come up. Is there anything I maybe missing when installing the 10G module or in my configurations?
Thanks!

Hello Martin,
As a reference, please look at this link, it may help you,
https://supportforums.cisco.com/docs/DOC-36084
Berta.
MARTIN HUERTER escribió:I have installed a (3) switch stack of Catalyst 3850 switches. I installed a 10G module in the 1st switch (the master) configured it and plugged it into the network and all works fine. Now I would like to add a second 10 Gigabit Ethernet connection to the stack in a channel group. When I install the 10G module into the standby switch (switch 3) I can do a "show inventory" and the 10G module is there. I can configure TenGigabitEthernet 3/1/3 and do a show run interface TenGigabitEthernet 3/1/3 all looks normal, but when I do a "show interface status" it is not listed and I cannot get the interface to come up. Is there anything I maybe missing when installing the 10G module or in my configurations?Thanks!

Problem Cisco Catalyst 3850 input errors

Ive installed two stacked Catalyst 3850s. Connected to these two switches I have a SAN 6210 Equallogic Dell ESX .
The interfaces on the switches is bundels with Port-channel. MTU size 9198. On swich one its no problem but on switch two I see input errors on these interface.
If I move the cables from switch two to one then its ok...
I have two 10G going to the SAN. And 4 ESX server with 2 ISCSI each.
interface Port-channel21
description ESX1 ISCSI SAN
switchport access vlan 21
switchport mode access
flowcontrol receive desired
spanning-tree portfast
spanning-tree bpduguard enable
Port-channel21 is up, line protocol is up (connected)
Hardware is EtherChannel, address is
Description: ESX1 ISCSI SAN
MTU 9198 bytes, BW 2000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 17/255, rxload 16/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is
input flow-control is off, output flow-control is unsupported
Members in this channel: Gi1/0/25 Gi1/0/34
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:07:12, output never, output hang never
Last clearing of "show interface" counters 1d21h
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 128760000 bits/sec, 8233 packets/sec
5 minute output rate 137021000 bits/sec, 7343 packets/sec
     520088013 packets input, 1454135312 bytes, 0 no buffer
     Received 1088 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     1534 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     564793180 packets output, 978716517 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

Hi and Sorry Just copied and past the part that I thought was the problem. It seems that MTU size on switch two in the stack still has MTU 1500......
So here is the lot....
This interface is OK
sh controllers ethernet-controller g1/0/25
Transmit                  GigabitEthernet1/0/25                 Receive
2373084674113 Total bytes               2700589618458 Total bytes
   1259517537 Unicast frames               1355829627 Unicast frames
2373055994149 Unicast bytes             2700589410330 Unicast bytes
       314726 Multicast frames                      0 Multicast frames
     25604588 Multicast bytes                       0 Multicast bytes
        44657 Broadcast frames                   3252 Broadcast frames
      3075376 Broadcast bytes                  208128 Broadcast bytes
            0 System FCS error frames               0 IpgViolation frames
            0 MacUnderrun frames                    0 MacOverrun frames
            0 Pause frames                          0 Pause frames
            0 Cos 0 Pause frames                    0 Cos 0 Pause frames
            0 Cos 1 Pause frames                    0 Cos 1 Pause frames
            0 Cos 2 Pause frames                    0 Cos 2 Pause frames
            0 Cos 3 Pause frames                    0 Cos 3 Pause frames
            0 Cos 4 Pause frames                    0 Cos 4 Pause frames
            0 Cos 5 Pause frames                    0 Cos 5 Pause frames
            0 Cos 6 Pause frames                    0 Cos 6 Pause frames
            0 Cos 7 Pause frames                    0 Cos 7 Pause frames
            0 Oam frames                            0 OamProcessed frames
            0 Oam frames                            0 OamDropped frames
       423237 Minimum size frames               78563 Minimum size frames
    593742624 65 to 127 byte frames         338414660 65 to 127 byte frames
      1416083 128 to 255 byte frames          4836098 128 to 255 byte frames
       558097 256 to 511 byte frames          1505992 256 to 511 byte frames
      5464138 512 to 1023 byte frames         6457219 512 to 1023 byte frames
    472854085 1024 to 1518 byte frames      834470341 1024 to 1518 byte frames
        80781 1519 to 2047 byte frames         257961 1519 to 2047 byte frames
      2891352 2048 to 4095 byte frames       13701476 2048 to 4095 byte frames
     14353508 4096 to 8191 byte frames        8698824 4096 to 8191 byte frames
    168093015 8192 to 16383 byte frames     147411745 8192 to 16383 byte frames
            0 16384 to 32767 byte frame             0 16384 to 32767 byte frame
            0 > 32768 byte frames                   0 > 32768 byte frames
            0 Late collision frames                 0 SymbolErr frames
            0 Excess Defer frames                   0 Collision fragments
            0 Good (1 coll) frames                  0 ValidUnderSize frames
            0 Good (>1 coll) frames                 0 InvalidOverSize frames
            0 Deferred frames                       0 ValidOverSize frames
            0 Gold frames dropped                   0 FcsErr frames
            0 Gold frames truncated
            0 Gold frames successful
            0 1 collision frames
            0 2 collision frames
            0 3 collision frames
            0 4 collision frames
            0 5 collision frames
            0 6 collision frames
            0 7 collision frames
            0 8 collision frames
            0 9 collision frames
            0 10 collision frames
            0 11 collision frames
            0 12 collision frames
            0 13 collision frames
            0 14 collision frames
            0 15 collision frames
            0 Excess collision frames
LAST UPDATE 4870 msecs AGO
This interface have problem. It is in portchannel with g1/0/25. Ive got more interfaces and port-channels showing the same behavior for switch two in my cluster.
sh controllers ethernet-controller g2/0/25
Transmit                  GigabitEthernet2/0/25                 Receive
925460044357 Total bytes                201085804055 Total bytes
    702370104 Unicast frames                184041790 Unicast frames
925449913241 Unicast bytes              201085599895 Unicast bytes
       118823 Multicast frames                      0 Multicast frames
      9171804 Multicast bytes                       0 Multicast bytes
        14251 Broadcast frames                   3190 Broadcast frames
       959312 Broadcast bytes                  204160 Broadcast bytes
            0 System FCS error frames               0 IpgViolation frames
            0 MacUnderrun frames                    0 MacOverrun frames
            0 Pause frames                          0 Pause frames
            0 Cos 0 Pause frames                    0 Cos 0 Pause frames
            0 Cos 1 Pause frames                    0 Cos 1 Pause frames
            0 Cos 2 Pause frames                    0 Cos 2 Pause frames
            0 Cos 3 Pause frames                    0 Cos 3 Pause frames
            0 Cos 4 Pause frames                    0 Cos 4 Pause frames
            0 Cos 5 Pause frames                    0 Cos 5 Pause frames
            0 Cos 6 Pause frames                    0 Cos 6 Pause frames
            0 Cos 7 Pause frames                    0 Cos 7 Pause frames
            0 Oam frames                            0 OamProcessed frames
            0 Oam frames                            0 OamDropped frames
       155980 Minimum size frames                3226 Minimum size frames
     92357460 65 to 127 byte frames          52503630 65 to 127 byte frames
       542363 128 to 255 byte frames           660137 128 to 255 byte frames
      1843346 256 to 511 byte frames           500600 256 to 511 byte frames
      6158096 512 to 1023 byte frames         1116353 512 to 1023 byte frames
    601445933 1024 to 1518 byte frames      129261034 1024 to 1518 byte frames
            0 1519 to 2047 byte frames         319527 1519 to 2047 byte frames
            0 2048 to 4095 byte frames              0 2048 to 4095 byte frames
            0 4096 to 8191 byte frames              0 4096 to 8191 byte frames
            0 8192 to 16383 byte frames             0 8192 to 16383 byte frames
            0 16384 to 32767 byte frame             0 16384 to 32767 byte frame
            0 > 32768 byte frames                   0 > 32768 byte frames
            0 Late collision frames                 0 SymbolErr frames
            0 Excess Defer frames                   0 Collision fragments
            0 Good (1 coll) frames                  0 ValidUnderSize frames
            0 Good (>1 coll) frames            319524 InvalidOverSize frames
            0 Deferred frames                       3 ValidOverSize frames
            0 Gold frames dropped                   0 FcsErr frames
            0 Gold frames truncated
            0 Gold frames successful
            0 1 collision frames
            0 2 collision frames
            0 3 collision frames
            0 4 collision frames
            0 5 collision frames
            0 6 collision frames
            0 7 collision frames
            0 8 collision frames
            0 9 collision frames
            0 10 collision frames
            0 11 collision frames
            0 12 collision frames
            0 13 collision frames
            0 14 collision frames
            0 15 collision frames
            0 Excess collision frames

Catalyst 3850 Cross-Stack EtherChannel

On 3850 configuration guide, I came across PAgP desirable mode is not supported in the switch stack (cross-stack EtherChannel).
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/layer2/configuration_guide/b_lay2_3se_3850_cg/b_lay2_3se_3850_cg_chapter_0101.html
But on Q&A document, it mentioned 3850 supports PAgP.
Q. What cross-stack EtherChannel link bundling protocols are supported?
A. The Cisco Catalyst 3850 supports Cisco Port Aggregation Protocol (PAgP) and industry-standard IEEE 802.3ad Link Aggregation Control Protocol (LACP). Other 3750 Series Switches support only LACP for cross-stack EtherChannel.
Seems like both statements are contradicting.
Can someone shed some light on this?
Thank you.

Hi, adimakmur
Cisco Catalyst 3850 Cross-Stack EtherChannel can be PAgP+ and can be used for VSS dual active detection.
In last deployment of 3850 we use Cross-Stack EtherChannel and use it as trusted for VSS dual active detection.
c6500-V#sh switch virtual dual-active pagp
PAgP dual-active detection enabled: Yes
PAgP dual-active version: 1.1
----skiped----
Channel group 106 dual-active detect capability w/nbrs
Dual-Active trusted group: Yes
Dual-Active Partner Partner Partner
Port Detect Capable Name Port Version
Te1/7/7 Yes c3850-307 Te1/1/3 1.1
Te2/7/7 Yes c3850-307 Te2/1/3 1.1
---skiped----
c6500-V#sh etherchannel 106 protocol
Protocol: PAgP
c3850-307#sh etherchannel port-channel
Channel-group listing:
Group: 1
Port-channels in the group:
Port-channel: Po1
Age of the Port-channel = 235d:20h:50m:10s
Logical slot/port = 12/1 Number of ports = 2
GC = 0x00010001 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Protocol = PAgP
Port security = Disabled
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 00 Te1/1/3 Desirable-Sl 0
0 00 Te2/1/3 Desirable-Sl 0
Time since last port bundled: 169d:04h:58m:49s Te1/1/3
Time since last port Un-bundled: 169d:05h:00m:47s Te1/1/3

Cisco Catalyst 3850 Series

Can I use DC power supply for
Cisco Catalyst 3850 Series?

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Catalyst 3850 vs Nexus 3K

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