Etherchannel between two 2950 switches

I have a etherchannel defined between 2 L2 switches using LACP as shown below. The etherchannel works fine, however when I hard code speed/duplex on both ends the etherchannel fails. What is causing this behaviour?
SW02:
interface Port-channel5
interface GigabitEthernet1/0/1
switchport mode trunk
channel-group 5 mode active
interface GigabitEthernet1/0/2
switchport mode trunk
channel-group 5 mode active
SW02:
interface Port-channel5
interface GigabitEthernet1/0/1
switchport mode trunk
channel-group 5 mode active
interface GigabitEthernet1/0/2
switchport mode trunk
channel-group 5 mode active

Thank you for the rating.
Regarding your replacement scenario, I'll give the standard engineering answer ("it depends"), but actually follow up with something I hope is more helpful. I'm sincerely interested to see other's viewpoint on this as well, as it has changed over the years.
Many years ago (let's say a decade) I ran into problems with some devices not being able to auto-negotiate properly. There was a tendancy for devices to fail or negotiate to half-duplex mode when a full-duplex connection was warranted. At the time, the problems we experienced were mainly with traffic shaping devices and some other gear. There were others using fixed settings as a standard practice, and we did the same since we had verifiable issues.
Fast forward to now. I personally have not experienced auto-negotiation problems in a long time and am reading more from others in the field that auto-negotiation is the way to go (such as from the link provided). Indeed, I've now run into the opposite scenario: I had a particular situation where a link between two devices defaulted to half-duplex EVEN THOUGH they were both set to 100/Full. It turned out to be a race condition between a device and a Cisco router...the other device booted faster, didn't see anything on the link, and "helpfully" dropped down to half-duplex. I confirmed the issue with the device vendor, who recommended setting ports to auto-negotiate as the fix (their software would not be updated for a bit of time).
I would recommend auto-negotiate as a standard practice, with the exception of areas where you have encountered specific problems. Those latter cases should be caught through your pre-deployment testing, and discussed with the respective vendors so that you fully understand why the devices are behaving the way they are so that the proper mitigation measures can be put in place (i.e. - It is going to act the same way every time, and you can work with that).
Good luck! -Ed

Similar Messages

Trunk two 2950 switches

Can ANYONE instruct me on trunking two 2950 switches. Help!!

Hello,
basically, configure both interfaces you use for the trunk as following:
interface FastEthernet0/15
switchport mode trunk
The 2950 supports 802.1Q trunking only, so this is the only command you need.
This is a basic config, check this link for more optional features:
Configuring VLAN Trunks
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12122ea2/2950scg/swvlan.htm#wp1200245
HTH,
GP

Speed/Duplex between two different switchs & SFP

Hi everybody,
I'm sorry about my poor english... I'm French (but it is not contagious)
I need your help (or TAC Help ) about speed and duplex problems.
My network :
[C2960G-24TC-L with sfp GLC-FE-100LX on Gig 0/23] <--> (Singlemode Fiber 9/125µ) <--> [Cisco SF200-24 with sfp MFELX1 on Gi1]
Autonegociation everywhere...
My problem :
%CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet0/23 (not full duplex), with f02929f97095 gi1 (full duplex).
- I can't force speed/duplex on MFELX1 (actually a-full a-100)
- I can't force speed/duplex on GLC-FE-100LX (actually a-half a-100)
Is there an incompatibility between this equipements ?
Configuration detail :
WS-C2960G-24TC-L   12.2(58)SE2           C2960-LANBASEK9-M
Cisco SF200-24 Firmware Version (Active Image): 1.2.9.44
#sh int gig 0/23 capabilities
GigabitEthernet0/23
Model:                 WS-C2960G-24TC-L
Type:                  100BaseLX-FE SFP
Speed:                 100
Duplex:                half,full
Trunk encap. type:     802.1Q
Trunk mode:            on,off,desirable,nonegotiate
Channel:               yes
Broadcast suppression: percentage(0-100)
Flowcontrol:           rx-(off,on,desired),tx-(none)
Fast Start:            yes
QoS scheduling:        rx-(not configurable on per port basis),
                         tx-(4q3t) (3t: Two configurable values and one fixed.)
CoS rewrite:           yes
ToS rewrite:           yes
UDLD:                  yes
Inline power:          no
SPAN:                  source/destination
PortSecure:            yes
Dot1x:                 yes
Multiple Media Types: rj45, sfp, auto-select
#show int gigabitEthernet 0/23 transceiver properties
Diagnostic Monitoring is not implemented.
Name : Gi0/23
Administrative Speed: auto
Administrative Duplex: auto
Administrative Auto-MDIX: on
Administrative Power Inline: N/A
Operational Speed: 100
Operational Duplex: half
Operational Auto-MDIX: on
Media Type: 100BaseLX-FE SFP
Configured Media: auto-select
Active Media: sfp
Thank you so much for yor help !

Thank you Leo,
It doesn't work, but I found an solution !
A strange solution...
I forced the C2960G-24TC-L to work with SFP :
media-type sfp
When I do that, I have the possibility to force the duplex (but not the speed... ok why not... ) :
duplex full
It is not very clean but my link is up and full-100 both sides.
Not very clean because :
C2960 side = force duplex, auto speed
SF200 side = auto duplex, auto speed
No errors... the link is clean.
Anyone known the reason or a better solution ?

Etherchannel between 2960 switches

Hello All,
I configured etherchannel between two 2960 switches.
Both the switches have SVI with subnet 192.168.2.3 and 192.168.2.4
I have another vlan3 on one of the switch.
so when i created etherchannel between two Gig ports and allowed both the vlans,it gave me an error messg,
Nov 3 12:41:07.332 KSA: %EC-5-CANNOT_BUNDLE2: Gi1/0/19 is not compatible with Gi1/0/20 and will be suspended (vlan mask is different)
Nov 3 12:41:07.339 KSA: %EC-5-CANNOT_BUNDLE2: Gi1/0/19 is not compatible with Po1 and will be suspended (vlan mask is different)
Nov 3 12:41:07.339 KSA: %EC-5-CANNOT_BUNDLE2: Gi1/0/19 is not compatible with Po1 and will be suspended (vlan mask is different)
Nov 3 12:41:07.339 KSA: %EC-5-CANNOT_BUNDLE2: Gi1/0/20 is not compatible with Po1 and will be suspended (vlan m
May i know why....
Thanks

Hello Mudasir
This will be a problem of allowed vlan mismatch. All the interfaces which are going to add in the etherchannel must have same allowed vlan on both sides.
You can check for the allowed vlan on all the interfaces as well as on Port-channel.
You can see the below forum having the same problem:
https://supportforums.cisco.com/discussion/9757346/etherchannel-prob
Regards,
Mukesh Kumar
Network Engineer
Spooster IT Services

Virtual tunnel between 2950 switches

I would like to creat a virtual trunk between two 2950, both are far from each other i mean many switches install between them, how can i creat a tunnel between or Virtual trunk port.

Hi Mansoor,
Yes you have to establish new vlan but you should allow all the vlans from customer to pass through cause tunneling is done on 3550 till thee all vlans should be allowed. But I have not tested it with vlan restrictions.
Also make sure the vtp domain name server and password does not matches the customer or else it will do disaster.
Have a look at this link and the one I posted above for configuration guidelines
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/12_1e/swconfig/dot1qtnl.htm#wp1001228
HTH, if yes please rate the post.
Ankur

Dual core 6509/sup720b/PFC3/MSFC3 etherchannel with downstream 2950

I have 2 core 6509/SUP720b/PFC3/MSFC3 which are etherchannel attached. Due to budgetary restraints, we have no distribution layer and access switch trunk(2950, 3500xls) dual uplinks that are attached one to each 6509. Is it possible to form a etherchannel between the 2950 and the uplinks on seperate 6509 core switches. I have not tested it yet but wanted to know has anyone tested this configuration or using it in production?

No, etherchannel which is combining two or more ports to form a single logical port must terminate to a single switch. For example, switch A have gig 1 and 2 and each port connects to switch B and Switch C, you cannot create channel on switch to combine gig 1 and 2 because the ports does not connect to the same single switch. It is not allowed and it will not work. However, if you have four links from switch A, ports 1,2,3, and 4, where ports 1 and 2 connects to switch B and ports 3 and 4 connects to switch c, then you can create a channel combining 1 and 2 to swtich B and a separate channel combining 3 and 4 to switch C.
I hope that clears that up answered your question,
Please rate helpful posts.
Please rate helpful posts.

MDS DS-SFP-FC8 GLW 9 Micron between 2 9148 switches Max DB loss?

Does anyone know where to find a table that would indciate what the max acceptable DB loss would be between two 9148 switches utilizing
DS-SFP-FC8 GLW over 9 Micron cable.
It seems the SFP product data sheets do not provide this type of data.
I currently have two 9148 switches running at 8Gbps
TE link 1 is up and running at 8Gbps with 32 bb credits assigned to the port.
TE link 2 will not stay online at any speed 2-8Gbps with 32 to 64 credits assigned. I'm fairly certain this is a DB loss problem becuase the problem follows the cable path.
What I'm trying to resolve is how to determine what the max DB loss is over the link.
I understand the max distance for Dark fiber is as follows: 1310nm SMF 9.0 8.Gbps 10 km (6.2 mi)
So when I talk to folks that analyze the cables I can be eductaed on what the max DB loss is.
1310 SMF9.0 8.500 10 km (6.2 mi)
DB loss is as follows for TE link 1
Cable ID: 09 990
OTDR End1 PASSDate / Time: 10/02/2012 02:55:39pm
Cable Type: OS1 Singlemode
Tester: OptiFiber (9053014 V2.6.4)
Module: OFTM-5630 (9055001 V2.6.4)
Overall Length: 3706.8 ft
PASS
Overall Loss
PASS
1550 nm: 1.19 dB
PASS
ORL: < 32.32 dB1310 nm (n=1.4660) 1550 nm (n=1.4670)
Location Loss Status Loss Status
(ft) (dB) (dB)
0.0 N/A N/A N/A N/A
73.8 N/A N/A N/A N/A
246.1 0.30 N/A 0.74 N/A
334.6 N/A N/A N/A N/A
429.4 0.05 N/A N/A N/A
496.9 0.07 N/A N/A N/A
3573.9 0.48 N/A -0.01 N/A
3706.8 N/A N/A N/A N/A
OTDR End2 PASSDate / Time: 10/02/2012 01:51:32pm
Cable Type: OS1 Singlemode
Tester: OptiFiber (9053014 V2.6.4)
Module: OFTM-5630 (9055001 V2.6.4)
Overall Length: 3878.2 ft
PASS
Overall Loss
1310 nm: 1.24 dB
PASS
1550 nm: 0.80 dB
PASS
ORL: < 31.53 dBWARNING:
- Negative Loss value found in test result.1310 nm (n=1.4660) 1550 nm (n=1.4670)
Location Loss Status Loss Status
(ft) (dB) (dB)
0.0 N/A N/A N/A N/A
137.9 0.65 N/A 0.61 N/A
3464.1 -0.72 N/A N/A N/A
3612.5 N/A N/A N/A N/A
3640.2 1.00 N/A N/A N/A
3707.3 N/A N/A N/A N/A
3776.0 N/A N/A N/A N/A
3812.9 N/A N/A N/A N/A
3878.2 N/A N/A N/A N/A
Thanks,
Mike
OTDR End2 PASSDate / Time: 10/02/2012 01:55:57pm
Cable Type: OS1 Singlemode
Tester: OptiFiber (9053014 V2.6.4)
Module: OFTM-5630 (9055001 V2.6.4)
Overall Length: 3706.4 ft
PASS
Overall Loss
1310 nm: 1.34 dB
PASS
1550 nm: 0.79 dB
PASS
ORL: < 34.25 dB1310 nm (n=1.4660) 1550 nm (n=1.4670)
Location Loss Status Loss Status
(ft) (dB) (dB)
0.0 N/A N/A N/A N/A
138.0 0.46 N/A 0.17 N/A
303.8 N/A N/A 0.26 N/A
3464.5 0.47 N/A N/A N/A
3611.3 N/A N/A N/A N/A
3641.0 N/A N/A N/A N/A
3706.4 N/A N/A N/A N/A
Notice the 3.42 db loss overall loss occurs on the failing side of the cable link.
Cable ID: 09 990
OTDR End1 PASSDate / Time: 10/02/2012 02:57:16pm
Cable Type: OS1 Singlemode
Tester: OptiFiber (9053014 V2.6.4)
Module: OFTM-5630 (9055001 V2.6.4)
Overall Length: 3884.5 ft
PASS
Overall Loss
1310 nm: 3.42 dB
PASS
1550 nm: 0.75 dB
PASS
ORL: < 30.99 dB1310 nm (n=1.4660) 1550 nm (n=1.4670)
Location Loss Status Loss Status
(ft) (dB) (dB)
0.0 N/A N/A N/A N/A
73.0 N/A N/A N/A N/A
142.6 N/A N/A N/A N/A
245.7 0.04 N/A N/A N/A
331.9 N/A N/A N/A N/A
419.0 1.27 N/A N/A N/A
488.9 N/A N/A N/A N/A
501.1 N/A N/A N/A N/A
586.2 0.55 N/A N/A N/A
673.0 0.47 N/A N/A N/A
766.1 0.21 N/A N/A N/A
855.4 -0.01 N/A N/A N/A
959.0 0.19 N/A N/A N/A
3573.5 N/A N/A N/A N/A
3706.8 N/A N/A N/A N/A
3794.1 N/A N/A N/A N/A
3884.5 N/A N/A N/A N/A
1310 nm: 1.18 dB

I believe you run 'show interface fc x/y transceiver detail', it will provide the current light levels as well as the minimum and maximum limits.
Thank You,
Dan Laden

Need Help Connecting (2) 2950 switches together, cant see each other

Can anyone please help me get my switches talking? I am currently in training for entry level certs and can't continue until i get these talking.
I have two 2950 switches connected via port 0/1 on both switches. (tried both crossover and regular cat5 connections)
I have both ports active and both VLAN 1s active and both ports set to switchport mode trunk
There is no port security enabled. Both switches have IP's assigned in the respective default VLAN 1.
IP address 10.1.10.10 for switch 1
IP address 10.1.10.11 for switch 2
VTP is set to server on both, ( I tried transparent on both as well )
I cant get these switches to ping each other and or access telnet from each other. If i connect an outside connection i can telnet individually to each but they wont see each other through ping or CDP Neighbors.
Any ideas?? Please help as i am trying to get my CCENT in a few weeks!
THANK YOU!

******* SWITCH 1 LOGIN *******
User Access Verification
Password:
SW1>en
Password:
SW1#show run
SW1#show running-config
Building configuration...
Current configuration : 1884 bytes
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
hostname SW1
enable secret 5 $1$TIuw$zBOptQNhwsRgZ6Frv.PVx.
ip subnet-zero
ip ssh time-out 120
ip ssh authentication-retries 3
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
interface FastEthernet0/1
switchport mode trunk
interface FastEthernet0/2
switchport mode access
interface FastEthernet0/3
switchport mode access
interface FastEthernet0/4
switchport mode access
interface FastEthernet0/5
switchport mode access
interface FastEthernet0/6
switchport mode access
interface FastEthernet0/7
switchport mode access
interface FastEthernet0/8
switchport mode access
interface FastEthernet0/9
switchport mode access
interface FastEthernet0/10
switchport mode access
interface FastEthernet0/11
switchport mode access
interface FastEthernet0/12
switchport mode access
interface FastEthernet0/13
switchport mode access
interface FastEthernet0/14
switchport mode access
interface FastEthernet0/15
switchport mode access
interface FastEthernet0/16
switchport mode access
interface FastEthernet0/17
switchport mode access
interface FastEthernet0/18
switchport mode access
interface FastEthernet0/19
switchport mode access
interface FastEthernet0/20
switchport mode access
interface FastEthernet0/21
switchport mode access
interface FastEthernet0/22
switchport mode access
interface FastEthernet0/23
switchport mode access
interface FastEthernet0/24
switchport mode access
interface Vlan1
ip address 10.1.10.10 255.255.255.0
no ip route-cache
ip http server
banner motd ^C ******* SWITCH 1 LOGIN ******* ^C
line con 0
logging synchronous
login
line vty 0 4
password vty
login
line vty 5 15
password vty
login
end
SWITCH 2 BELOW
****** SWITCH 2 LOGIN ******
banner motd
User Access Verification
Password:
SW2>en
Password:
SW2#show run
SW2#show running-config
Building configuration...
Current configuration : 1894 bytes
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
hostname SW2
enable secret 5 $1$nSFY$umNCHgrkLGTwHyI.dkbJf.
ip subnet-zero
ip ssh time-out 120
ip ssh authentication-retries 3
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
interface FastEthernet0/1
switchport mode trunk
interface FastEthernet0/2
switchport mode access
interface FastEthernet0/3
switchport mode access
interface FastEthernet0/4
switchport mode access
interface FastEthernet0/5
switchport mode access
interface FastEthernet0/6
switchport mode access
interface FastEthernet0/7
switchport mode access
interface FastEthernet0/8
switchport mode access
interface FastEthernet0/9
switchport mode access
interface FastEthernet0/10
switchport mode access
interface FastEthernet0/11
switchport mode access
interface FastEthernet0/12
switchport mode access
interface FastEthernet0/13
switchport mode access
interface FastEthernet0/14
switchport mode access
interface FastEthernet0/15
switchport mode access
interface FastEthernet0/16
switchport mode access
interface FastEthernet0/17
switchport mode access
interface FastEthernet0/18
switchport mode access
interface FastEthernet0/19
switchport mode access
interface FastEthernet0/20
switchport mode access
interface FastEthernet0/21
switchport mode access
interface FastEthernet0/22
switchport mode access
interface FastEthernet0/23
switchport mode access
interface FastEthernet0/24
switchport mode access
interface Vlan1
ip address 10.1.10.11 255.255.255.0
no ip route-cache
ip http server
banner motd ^C ****** SWITCH 2 LOGIN ******
banner motd ^C
line con 0
logging synchronous
login
line vty 0 4
password vty
login
line vty 5 15
password vty
login
end

How do I quickly* switch between two Skype account...

I have a need to be able to quickly* switch between two Skype accounts on my Windows 7 desktop computer.
Both accounts have high-security difficult-to-remember and hard-to-type passwords.
Many products have a facility for doing this, remembering recent account/password combinations, or having linked accounts.
Does Skype have a way of doing this?
And if it doesn't, how do I request it get one be developed?
I use a password manager, LastPass, but of course Skype isn't a browser so it doesn't work with Lastpass.
* "Quickly switch" means without switching computer sign-on accounts and without re-typing the high-security difficult-to-remember and hard-to-type passwords many times per day.
I understand you're all volunteers. Thank you very much for your efforts on this.
- Keith
Solved!
Go to Solution.

This can be done by setting up an another Skype client in a separate directory and with a shortcut containing the extra /datapath, /removable and /secondary switches.
http://community.skype.com/t5/Windows-desktop-client/Why-did-Microsoft-have-to-go-and-ruin-Skype-lik...
For your purpose you can make use of a copy of Skype.exe of the already installed Skype application.

How to switch between two query in Web templete.

Hi all,
Here i am facing problem to switch between two query in web template by using one 'table' web item. is there any way to use hyperlink 'SAP_BW_URL' and we can switch to query. here i am using these HTML code..
<table><tr><td class="SAPBEXBtnStdBorder" cellspacing="0" cellpadding="0" border="0"><tr><td>
<table><tr><td class="sapbexbtnstd" ><A href="<SAP_BW_URL cmd='reset_item' item='table_data' query_ID='ZSD_ZSD_M01_Q20' apply_cmd_on_target= "X">" >Switch to other query</A></td></tr></table>
but i am not getting correct functionality.
please help me to solve this problem.
I know the best way to say thanks in SDN.
thanks
Kiran Patel

Kiran,
Use the web api reset_data_provider as links or in select option in HTML.
   Onchange event of this select option should call JAVASCRIPT method and
   this in turn resets the current dataprovider to your concerned one.
   How to change graphs:
   The graph item has the default data provider:
   <object>
         <param name="OWNER" value="SAP_BW"/>
         <param name="CMD" value="GET_ITEM"/>
         <param name="NAME" value="CHART_1"/>
         <param name="ITEM_CLASS" value="CL_RSR_WWW_ITEM_CHART"/>
         <param name="DATA_PROVIDER" value="DATAPROVIDER_1"/>
         <param name="TMP_CHART_DATA_HANDLE" value="IIP_49MOXB0UVNOMM6JOZMZU7QO21"/>
         ITEM:            CHART_1
   </object>
So if you change the DATAPROVIDER_1 using RESET_DATA_PROVIDER to your concerned DP, this changes chart as well !!
   Please use this method and refer to sample code for Onchange Event on SELECT OPTION:
<HTML>
<HEAD>
<script>
function callDP() {
     if(document.forms[0].dp.value == "1") {
        //form your URL here..
       url = SAP_BW_URL_Get() + "&CMD=RESET_DATA_PROVIDER&DATA_PROVIDER_1=..&...";
        SAPBWOpenURL(url);
        //or docuemtn.location.href = url..
        //etc..
</script>
</HEAD>
<BODY>
<form>
<select name="dp" onChange="javascript:callDP();">
<option value="1">1</option>
<option value="2">2</option>
</select>
</form>
</BODY>
</HTML>
HOPE THIS HELPS !!!

White box appears while switching between two desktops

Hello all,
Since few weeks I have a problem when I switch between two Desktops. Everytime I switch between them a white box appears in the left corner of my screen (see screenshot).

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and Wi-Fi on certain iMacs. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. Test while in safe mode. Same problem? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

HT1918 hi I'm travelling between two countries and i have a credit card and address in both, can i set up my itunes account to switch between the respectice i tunes stores

hi I'm travelling between two countries and i have a credit card and address in both, can i set up my itunes account to switch between the respectice i tunes stores

Not a single account, no, at least not easily. It would be better to set up individual iTunes Store accounts, one in each country. Your computer and devices can quite happily deal with two accounts, and then you can just log into the appropriate account when you're in the applicable country. You'll need a second email address to able to create a new Apple ID.
Regards.

Switching between two Apple IDs - 90 day wait?

I have been smoothly transitioning between two apple IDs on iTunes for the last year. I have just switched from PC to Mac and suddenly there's a message that states I have to wait 90 days before I can associate another Apple ID with this device. I don't really understand what this means, especially since I've already successfully logged in to both Apple ID accounts in iTunes on my new Mac. I don't want to wait 90 days every time I buy something from one account before it will let me buy something from the other (is this what this means?) I'd really appreciate an explanation from the learned Mac-user community. Thanks so much for your help!

annikaaus wrote:
Thank you, I did find that information myself, but it didn't really make things clearer to me. Once the 90 days is up will I be able to switch back and forth as I please? Or do I have to wait 90 days every time I want to switch IDs?
You can switch back & forth now as you please for new purchases (not for redownloading). 90 days is for redownloading.
iTunes prefs > Store.
Uncheck Automatic Downloads.
And why wasn't I aware of this wait time on my old PC device?
You never saw this because Automatic Downloads was not ticked.

Absolute time between two sets of switches

Hi!
I am trying to write a VI that will find the time difference between two sets of switches. I have attached what I currently have which only gets the time for one set of switches.
What I am trying to include in my VI includes inputing data from two different ports and finding the resulting time difference. The two sets of switches go into different ports on the usb. The starting switches are in port 2 whereas the stoping switches are in port 1. Switch one from the first set should start the timer and switch one from the second set should stop the timer. And this logic continues for the remaining sets. Switch 2 from the first set starts the time and switch 2 from the second set stops the timer...All six switches are completely independant so they can stop in any order.
I was also wondering how to just have the absolute time from start to stop in hrs/min/sec? And then how to I write the resulting 6 times in hrs/min/sec to a spreadsheet?
Thanks so much for your help! I apologize for my simple questions! I am new to labview and computer programming in general.
Attachments:
patch_six.vi ‏25 KB

Please don't start a new thread with the same question. I already gave you an answer in the original thread.

Etherchannel trunk with two cisco switch

Hi, my company using only one Cisco 3750 switch with VLAN1,2,3,4,5.
Now my company bought another cisco switch and we would like to etherchannel trunk between both and create new VLAN in new switch. We look over from partner, some of them suggested we use LACP, and some of them suggest we use PAgP. We are so confuse which will be better in our environment.
Previous: Router <> 3750 switch A (VLAN 1,2,3,4,5)
Now we bought another Cisco Switch B: Router <>3750 switch A <> switch B (add more VLAN 6,7,8,9,10)
Which of below command is the best choice to suit our company ? suppose we use 2 port of gigabitethernet 1/0/1 and 1/0/2 trunk? All VLAN 1-10 need to communicate with each other.
interface GigabitEthernet1/0/1
channel-group 1 mode active <<< (use "active" or "desirable" is the best choice)
switchport mode trunk
interface GigabitEthernet1/0/2
channel-group 1 mode active
switchport mode trunk
interface Port-channel 1
switchport trunk encapsulation dot1q << (do we need put this? as we think this is by default after trunk?)
switchport mode trunk
switchport nonegotiate <<< (do we need "nonegotiate" if both switch setup same configure?)

Hello
My understanding is pagp and lacp basically perform the same features - however as PAGP is cisco propriety LACP is IEEE standard which can be used between different route/switch vendor platforms.
As for disabling DTP ( switchport nonegotiate) - i would agree to do this suggestion, As so not to have trunks being dynamically created.
Lastly i would manually prune unused vlans across trunk interfaces, to save on cpu and memory usage because of the stp instances that coild be used ( however such a small vlan database like yours would not be an issue)
So to summarise:
Cisco to Cisco ehterchannels =PAGP
Cisco to other vendors = LACP
L2 etherchannel
================
1) default physical interfaces (if possible)
2) configure port-channel in physical interfaces
-- port-channel will be created automatically
3)create trunking encapsulation or access port mode directly in port-channel interface
4)enable physical interfaces "no shut"
conf t
default int ran fa0/1 -3 ( if applicable)
int ran fa0/1 -3
shut ( if applicable)
channel-group 1 mode xxx
int port-channel 1
switchport trunk encap dot1q
switchport- mode trunk
switchport nonegotiate
switchport trunk allowed vlan 1-10
res
Paul

Etherchannel between two 2950 switches

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