Cisco Catalyst 3850 Series

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

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Similar Messages

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.

Password reset on a Cisco Catalyst 3550 series

We have a Cisco Catalyst 3550 series, and we don't have the password to gain access to the switch through a web browser. My question is if I reset the password using Hyper-terminal, does changing the password affect any vlan or fiber optic settings that I should know about. Or does resetting the password changes our switch to factory settings?

Hi,
The password recovery procedure for your switch is described in this document:
http://www.cisco.com/c/en/us/support/docs/switches/catalyst-2950-series-switches/12040-pswdrec-2900xl.html
If you follow the instructions in the document exactly, you will retain the original configuration - you just rename the configuration file so that it is not loaded when the switch boots up. However, you will still be able to display it after the switch boots up using the more flash:config.old . Eventually, you can even load it into running-config using copy flash:config.old running-config command. At that point, the old passwords will be brought back but because you already are in the privileged EXEC mode, you can change them and save the updated configuration.
VLANs should not be affected as long as you do not delete the vlan.dat file located in FLASH. Fiber optic ports should not be affected as long as you are using original Cisco GBICs. If you're using 3rd party GBICs, it may be necessary to enter the service unsupported-transceiver hidden command in the global configuration mode before they get recognized.
Good luck!
Best regards,
Peter

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.

After upgrading ios Cisco Catalyst 6500 Series Supervisor Engine 2T to the latest release the ASA-SM module is not recognized

after upgrading ios Cisco Catalyst 6500 Series Supervisor Engine 2T to the latest release the ASA-SM module is not recognized it is disabled. the FPD
is not recognized any more. reverted back to previous ios with no luck

Duplicate post.
Being discussed actively in this thread.

After upgrading ios Cisco Catalyst 6500 Series Supervisor Engine 2T ASA-SM is disabled

after upgrading ios Cisco Catalyst 6500 Series Supervisor Engine 2T to the latest release the ASA-SM module is not recognized it is disabled. the FPD
is not recognized any more. reverted back to previous ios with no luck

What IOS are you running on your Supervisor 2T? As long as it's 15.0(1)SY1 or later you should be OK. (Reference).
If it's not working with that I'd try reload of the ASA SM module (from IOS cli - e.g. "hw-module <module#> reset" and, failing that, "no power-enable module <module#>" followed by "power-enable module <module#>) while the new Supervisor is installed. Watch the log for relevant messages during that process.

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

Cisco catalyst 3850 switch won't take command: "switchport mode trunk encapsulation dot 1q"

Hi all,
I'am working on this switch's configuration. when I typed "switchport mode trunk encapsulation dot 1q", I got an error " invavid input". I'm guessing that this model already set encapsulation type to dot 1q, and that's why the switch won't take it, right?
Please help!

According to the documents it supports both.
You are however using the wrong command, it should be -
"switchport trunk encapsulation dot1q"
ie. no "mode" keyword.
If it doesn't take that then do a "sh int <x> capabilities" and it should show you which encapsulation methods are supported.
Jon

Cisco Catalyst 3750-X or 3560-X Series Switches

Recently, our company was deciding to buy Cisco switches, but they just tell the requirements and I finally focused on two kinds of switches, Cisco Catalyst
3750-X or 3560-XSeries Switches? Who can tell me, tnx in advance.

As I read a blog recently, it listed the specific differences between Cisco 3750-X and 3560-X, except for the common features of Cisco 3750-X and 3560-X, Cisco 3750-X can also offer-- Cisco StackPower technology: An innovative feature and industry first for sharing power among stack members;
Cisco StackWise Plus technology for ease of use and resiliency with 64 Gbps of throughput;
Investment protection with backward compatibility with all other models of Cisco Catalyst 3750 Series Switches.
And made a more detailed comparison between the two products, for ur reference.

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

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 *

Cisco Switches (2960 Series) Management

We are managing these devices using HP OpenView Network Node Manager (Ver. 7.5) on HP-UX platform.
What are the known problems, limitations on its initial discovery and on later stages of managing the same ?

The Cisco Catalyst 2960 Series supports the Cisco IOS LAN BASE software image. This software image is a rich suite of intelligent services that is also available in a crypto image at no additional charge.
Cisco Network Assistant also offers centralized management and configuration of Cisco switches and other Cisco devices such as routers and wireless access points. With Cisco Network Assistant, in addition to configuring multiple switches at a time, you can configure Cisco wireless access points, and invoke the Device Manager on Cisco routers and access points. Cisco Network Assistant can be downloaded (available at no cost).
This URL should help you:
http://www.cisco.com/en/US/products/ps5931/index.html

DHCP on Cisco Catalyst 2950 Switch

Hello
I need to configure my cisco catalyst 2950 series switch in order to act as DHCP server for devices connected to its ports.
Please say me, how to do that ?
Thank you
Narek

Please find the sample DHCP configuration for one of the VLANs.
Interface Vlan1
description Cisco DHCP
ip address 10.10.2.1 255.255.255.0
ip dhcp pool cisco
network 10.10.2.0 255.255.255.0
default-router 10.10.2.1
domain-name mydomain.com
dns-server 10.10.2.10
netbios-name-server 10.10.2.15
lease 7
A 24 hour lease is the default if left out and the netbios-name-server is WINS in the Windows world.
If you want to use DHCP server for other VLANs as well create similar DHCP pools and assign the DG to the corresponding VLAN interface IP.
HTH, rate if it does
Narayan

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

Cisco Catalyst 3850 Series

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