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.
Similar Messages
-
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 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 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
MarkusHi 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 -
Cisco catalyst 2690 switch vlanTable
Hi,
I have a cisco catalyst 2690 switch.
I want monitoring IP, MAC, and Port Address.
I use this docu: http://docstore.mik.ua/orelly/perl/sysadmin/ch10_03.htm
This works great:
htvtef7-nagios:/ # snmptranslate -On BRIDGE-MIB:dot1dTpFdbTable
.1.3.6.1.2.1.17.4.3
snmpwalk -c tef7snmp@761 -v 2c 10.76.1.7 .1.3.6.1.2.1.17.4.3
htvtef7-nagios:/ # snmptranslate -On BRIDGE-MIB:dot1dBasePortTable
.1.3.6.1.2.1.17.1.4
snmpwalk -c tef7snmp@761 -v 2c 10.76.1.7 .1.3.6.1.2.1.17.1.4
htvtef7-nagios:/ # snmptranslate -On CISCO-STACK-MIB:vlanTable
.1.3.6.1.4.1.9.5.1.9.2
But I get a error:
htvtef7-nagios:/ # snmpwalk -c tef7snmp -v 2c 10.76.1.7 .1.3.6.1.4.1.9.5.1.9.2
SNMPv2-SMI::enterprises.9.5.1.9.2 = No Such Object available on this agent at this OID
Switch config:
snmp-server community testament RO
snmp-server community tef7snmp RO
snmp-server location XYZ
snmp-server contact MR.XYZ
snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart
snmp-server enable traps tty
snmp-server enable traps cluster
snmp-server enable traps entity
snmp-server enable traps cpu threshold
snmp-server enable traps vtp
snmp-server enable traps vlancreate
snmp-server enable traps vlandelete
snmp-server enable traps flash insertion removal
snmp-server enable traps port-security
snmp-server enable traps envmon
snmp-server enable traps mac-notification
snmp-server enable traps copy-config
snmp-server enable traps config
snmp-server enable traps bridge newroot topologychange
snmp-server enable traps stpx inconsistency root-inconsistency loop-inconsistency
snmp-server enable traps syslog
snmp-server enable traps vlan-membership
snmp-server host XXX.XXX.XXX.XXX public
snmp-server host YYY.YYY.YYY.YYY tef7snmp
What did I do wrong?
THX!/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Normál táblázat";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:"Times New Roman";
mso-ansi-language:#0400;
mso-fareast-language:#0400;
mso-bidi-language:#0400;}
Thx for the replay!
I use on the switch c2960-lanbasek9-mz.122-25.SEE3.bin (IOS),
the Cisco Feature Navigator say, this IOS support the CISCO-STACK-MIB:
http://tools.cisco.com/ITDIT/MIBS/MainServlet?ReleaseSel=0&PlatformSel=0&fsSel=0&IMAGE_NAME=c2960-lanbasek9-mz.122-25.SEE3.bin&SUBMIT2=Submit&IMAGE_ID=816103
In show snmp mib I could not find the vlanTable. See the attachment.
I du not understand! -
Cisco Catalyst Blade Switch 3020
Information about the Cisco Catalyst Blade Switch 3020
Does it support TCP SYN Flooding Attacks Mitigations Techniques
As per the Request for Comments: 4987Most of the common DOS attack mitigation strategies (good overview here) are configurable on the CBS 3020. There's no "one step lockdown" like the autosecure feature on routers but the configuration guide covers all of the details on setting the individual mechanisms (DHCP Snooping, DAI, IP source guard, etc.) you may wish to employ.
-
Can I use DC power supply for
Cisco Catalyst 3850 Series?Unfortunately your post is off topic here, in the TechNet Site Feedback forum, because it is not Feedback about the TechNet Website or Subscription. This is only one forum among the many
that are on the TechNet Discussion Forums, and given your post, you likely chose the wrong forum. This is a standard response I’ve written up in advance to help many people (thousands, really.) who post their question in this forum in error, but please
don’t ignore it. The links I share below I’ve collected to help you get right where you need to go with your issue.
For technical issues with Microsoft products that you would run into as an
end user of those products, one great source of info and help is
http://answers.microsoft.com, which has sections for Windows, Hotmail, Office, IE, and other products. Office related forums are also here:
http://office.microsoft.com/en-us/support/contact-us-FX103894077.aspx
For Technical issues with Microsoft products that you might have as an
IT professional (like technical installation issues, or other IT issues), you should head to the TechNet Discussion forums at
http://social.technet.microsoft.com/forums/en-us, and search for your product name.
For issues with products you might have as a Developer (like how to talk to APIs, what version of software do what, or other developer issues), you should head to the MSDN discussion forums at
http://social.msdn.microsoft.com/forums/en-us, and search for your product or issue.
If you’re asking a question particularly about one of the Microsoft Dynamics products, a great place to start is here:
http://community.dynamics.com/
If you really think your issue is related to the subscription or the TechNet Website, and I screwed up, I apologize! Please repost your question to the discussion forum and include much more
detail about your problem, that could include screenshots of the issue (do not include subscription information or product keys in your screenshots!), and/or links to the problem you’re seeing.
If you really had no idea where to post this question but you still posted it here, you still shouldn’t have because we have a forum just for you! It’s called the Where is the forum for…?
forum and it’s here: http://social.msdn.microsoft.com/forums/en-us/whatforum/
Moving to off topic.
Thanks
MSDN and TechNet Subscriptions Support
Did Microsoft call you out of the blue about your computer?
No, they didn't. -
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
NarekPlease 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 -
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 outHi 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 4000 Switch Console
I have a dumb Question what type of connection is this console connection? I thought this switch used a RJ45 + Serial so I plugged into the ethernet jack next console console not noticing its just a regular 10 base-t could this be used to console into this switch? I have attached an image below.
I have a dumb Question what type of connection is this console
connection? I thought this switch used a RJ45 + Serial so I plugged
into the ethernet jack next console console not noticing its just a
regular 10 base-t could this be used to console into this switch? I
have attached an image below.
Hi,
A console connection is a service that provides access to the system console of a computing device via networking technologies.
Check out the below link for console connection using PC on cisco devices.
http://www-tss.cisco.com/eservice/compass/common/tasks/task_console_port_connect.htm
Hope to Help !!
Ganesh.H
Remember to rate the helpful post -
"Cisco Catalyst Blade Switch 3020 for HP" Best Practices
Hi all,
Here we use this blade switch cluster for the Data Center server farm. Here we noticed some network traffic delay. when I monitor the up link I can see there is not much traffic in the link. So doubt about the traffic delay. If anyone can help me on this it would be great...
Thanks in Progress.....
ChandanaHere in the "blade switch for HP" a request processing application is running in a server. when we use the same type server stand alone with a separate switch it processes 80,000 requests per 4 hours. But when this blade server in the blade switch it only processes near 6,000 requests per 4 hours.
That what I mean like "Network delay"...
That is what I cannot understand.
I have attached the current configuration of the blade switch so you can go through it.
Is there any best practices specific to that type of blade switch that should enable?
Thanks for your help
regards
Chandana -
STP LED status with Cisco Catalyst Blade Switch 3130
Hi,
The usual status LED of a STP Blocked interface is orange. With this Switch (3130), the LED is green while the RSTP status port is Alternate Blocked. Is this normal ? Is there any documentation about RSTP LED status ?G'day,
I think you have the wrong forum! :)
cheers -
What is the max number of 3850 switches in a stack
This doc states 4. Has there been any change to allow more?
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-series-switches/qa_c67-722110.htmlUp 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.
http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-series-switches/qa_c67-722110.html -
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?
FawadHi ,
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 *
Maybe you are looking for
-
My game was 'fashion story' and currently level 90. But after I restored my iPad, it went back to level 1. Please please help
-
RE logical/physical standby database
1. Why logical standby database is SQL apply, and Physical standby database is redo apply? What 's the meaning/objective for that? (pls don't tell me what is SQL/redo apply) 2. As we know, a logical standby database can be used for reporting and quer
-
Remove imessage from sold iphone
I know this has been asked like a thousand times... I have changed from android to iphone then back to android. iphone users who contacts me for the first time while I am using Android now will send imessage instead of normal sms. as I don't have acc
-
3G iPod - No Display on iPod but being recogonized in iTunes
Hi All, Seems like my iPod is sick! The screen is not working (no display) but it is being recognised in iTunes. I have restored original settings but I have the same problem. Any ideas welcome. Thanks PC Windows XP
-
i have a SG300-28 switch here but I do not have the password to login the device. From the startup config of the switch, I see the login password is encrypted. Are there anyway for me to access the device without reset it?