Channel-group command
Could someone point me to a link about information about this command besides its options and such. If you dont know of a link but know the command, some of the questions I'm having include:
(1) what are the benefits of this command and why would you use this configuration?
(2) What platforms will this work for?
(3) If using between two switches and lets say you have four fiber links between the two, can you put three of the links into a channel-group and leave the other link out of the channel-group?
(4) Do the interfaces in the channel-group have to be in the same slot (same switching module) to be in a channel-group?
(5) Again, if you have two switches connected by four fiber links and you put each side of interfaces in a channel-group, do both sides have to be the same channel-group number?
(6) Neglecting that it is a hardware or line problem, what might be the reason for some of the interfaces in a channel-group to come up while others dont assuming that all the interfaces are configured exactly the same?
(1) what are the benefits of this command and why would you use this configuration?
>> channel-group x mode is an interface configuration to group identical interfaces in a combined logical interface, think of it as small pipes being combined to create a bigger pipe so that you can have more flows.
(2) What platforms will this work for?
>> channel-group is specific to catalyst running IOS like 2950, 2955, 2960, 2970, 3550, 3560, 3750, cat4000 with sup II+ or above, cat6000 with sups running Native IOS. For catalyst running it will be "port channel" command.
(3) If using between two switches and lets say you have four fiber links between the two, can you put three of the links into a channel-group and leave the other link out of the channel-group?
>> yes, by virtue of channel it will have a lower cost than the single interface therefore STP will block the single interface because it has a higher path cost to the root (STP can be discuss in a separate discussion).
(4) Do the interfaces in the channel-group have to be in the same slot (same switching module) to be in a channel-group?
>> No it does not have to be but they have to be identical. You cannot channel two ports where one is 100 MB and the other is a gig port.
(5) Again, if you have two switches connected by four fiber links and you put each side of interfaces in a channel-group, do both sides have to be the same channel-group number?
>> NO, channel group have local significance. If on switch A port 1 and 2 are in channel-group 1 and port 1 and 2 are connecting to port 3 and 4 of switch B. In switch B port 3 and 4 can be in channel-group 2 or 3 or 1 if you want to keep them the same for administrative sanity.
(6) Neglecting that it is a hardware or line problem, what might be the reason for some of the interfaces in a channel-group to come up while others dont assuming that all the interfaces are configured exactly the same?
>> cabling not right, interfaces in the same channel group are not alike, problem with the other end, or bug but this seldom is the case.
Please rate helpful posts.
Similar Messages
-
Port quarantined due to Cmd Failure, Failure applying command channel-group mac-pinning
Hi,
we run an UCS domain with several server, having two FIs. Each blade has 18 vNICs, 9 to Fabric-A and 9 to Fabric-B. Now for some weird reason we get the error for our management vlan (5), which has two dedicated vNICs, inteface x/y has been quarantined... --> failure when enabling PC mac-pinning
sh logging logfile | grep INTER:
2014 May 21 07:28:14 be-egt-sw-p8 %ETH_PORT_CHANNEL-5-PCM_CHANNEL_ID_ASSIGNED: Assigning port channel number 81 for member ports Ethernet3/1
2014 May 21 07:28:14 be-egt-sw-p8 %PORT-PROFILE-2-INTERFACE_QUARANTINED: Interface Ethernet3/1 has been quarantined due to Cmd Failure
2014 May 21 07:28:15 be-egt-sw-p8 %ETH_PORT_CHANNEL-5-PCM_CHANNEL_ID_ASSIGNED: Assigning port channel number 81 for member ports Ethernet3/10
2014 May 21 07:28:15 be-egt-sw-p8 %PORT-PROFILE-2-INTERFACE_QUARANTINED: Interface Ethernet3/10 has been quarantined due to Cmd Failure
sh accounting log:
Wed May 21 07:28:14 2014:update:ppm.14356:admin:configure terminal ; interface Ethernet3/1 (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14356:admin:configure terminal ; interface Ethernet3/1 ; no switchport trunk allowed vlan (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14356:admin:configure terminal ; interface Ethernet3/1 ; no switchport mode trunk (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14364:admin:configure terminal ; interface Ethernet3/1 (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14364:admin:configure terminal ; interface Ethernet3/1 ; switchport mode trunk (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14364:admin:configure terminal ; interface Ethernet3/1 ; switchport trunk allowed vlan 5 (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14364:admin:configure terminal ; interface Ethernet3/1 ; channel-group auto mode on mac-pinning (FAILURE)
Wed May 21 07:28:14 2014:update:ppm.14379:admin:configure terminal ; interface Ethernet3/10 (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14379:admin:configure terminal ; interface Ethernet3/10 ; no switchport trunk allowed vlan (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14379:admin:configure terminal ; interface Ethernet3/10 ; no switchport mode trunk (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14393:admin:configure terminal ; interface Ethernet3/10 (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14393:admin:configure terminal ; interface Ethernet3/10 ; switchport mode trunk (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14393:admin:configure terminal ; interface Ethernet3/10 ; switchport trunk allowed vlan 5 (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14393:admin:configure terminal ; interface Ethernet3/10 ; channel-group auto mode on mac-pinning (FAILURE)
We tried wich port-channel based on cdp information, but same errrors occured. The weird thing is that it only applies to mgmt port-profile...
Can someone help me what I'm doing wrong here... thanks a lot :)
Uplink Config:
port-profile type ethernet ESX_MGMT
vmware port-group
switchport mode trunk
switchport trunk allowed vlan 5
channel-group auto mode on mac-pinning
no shutdown
system vlan 5
state enabled
vEth Config:
port-profile type vethernet VLANname
capability l3control
vmware port-group
switchport mode access
switchport access vlan 5
no shutdown
system vlan 5
max-ports 64
state enabled
Kind regards,
YanHi,
we run an UCS domain with several server, having two FIs. Each blade has 18 vNICs, 9 to Fabric-A and 9 to Fabric-B. Now for some weird reason we get the error for our management vlan (5), which has two dedicated vNICs, inteface x/y has been quarantined... --> failure when enabling PC mac-pinning
sh logging logfile | grep INTER:
2014 May 21 07:28:14 be-egt-sw-p8 %ETH_PORT_CHANNEL-5-PCM_CHANNEL_ID_ASSIGNED: Assigning port channel number 81 for member ports Ethernet3/1
2014 May 21 07:28:14 be-egt-sw-p8 %PORT-PROFILE-2-INTERFACE_QUARANTINED: Interface Ethernet3/1 has been quarantined due to Cmd Failure
2014 May 21 07:28:15 be-egt-sw-p8 %ETH_PORT_CHANNEL-5-PCM_CHANNEL_ID_ASSIGNED: Assigning port channel number 81 for member ports Ethernet3/10
2014 May 21 07:28:15 be-egt-sw-p8 %PORT-PROFILE-2-INTERFACE_QUARANTINED: Interface Ethernet3/10 has been quarantined due to Cmd Failure
sh accounting log:
Wed May 21 07:28:14 2014:update:ppm.14356:admin:configure terminal ; interface Ethernet3/1 (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14356:admin:configure terminal ; interface Ethernet3/1 ; no switchport trunk allowed vlan (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14356:admin:configure terminal ; interface Ethernet3/1 ; no switchport mode trunk (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14364:admin:configure terminal ; interface Ethernet3/1 (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14364:admin:configure terminal ; interface Ethernet3/1 ; switchport mode trunk (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14364:admin:configure terminal ; interface Ethernet3/1 ; switchport trunk allowed vlan 5 (SUCCESS)
Wed May 21 07:28:14 2014:update:ppm.14364:admin:configure terminal ; interface Ethernet3/1 ; channel-group auto mode on mac-pinning (FAILURE)
Wed May 21 07:28:14 2014:update:ppm.14379:admin:configure terminal ; interface Ethernet3/10 (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14379:admin:configure terminal ; interface Ethernet3/10 ; no switchport trunk allowed vlan (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14379:admin:configure terminal ; interface Ethernet3/10 ; no switchport mode trunk (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14393:admin:configure terminal ; interface Ethernet3/10 (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14393:admin:configure terminal ; interface Ethernet3/10 ; switchport mode trunk (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14393:admin:configure terminal ; interface Ethernet3/10 ; switchport trunk allowed vlan 5 (SUCCESS)
Wed May 21 07:28:15 2014:update:ppm.14393:admin:configure terminal ; interface Ethernet3/10 ; channel-group auto mode on mac-pinning (FAILURE)
We tried wich port-channel based on cdp information, but same errrors occured. The weird thing is that it only applies to mgmt port-profile...
Can someone help me what I'm doing wrong here... thanks a lot :)
Uplink Config:
port-profile type ethernet ESX_MGMT
vmware port-group
switchport mode trunk
switchport trunk allowed vlan 5
channel-group auto mode on mac-pinning
no shutdown
system vlan 5
state enabled
vEth Config:
port-profile type vethernet VLANname
capability l3control
vmware port-group
switchport mode access
switchport access vlan 5
no shutdown
system vlan 5
max-ports 64
state enabled
Kind regards,
Yan -
How do I check to see if a channel group exists in the data portal?
I have a list of channel groups in the data portal but sometimes some channel groups are not created all the time. How do I check using a script if a channel group exists or was created.
Hello jreynolds!
With the command 'GroupIndexGet'. It returns 0 if the group does not exist.
Matthias
Matthias Alleweldt
Project Engineer / Projektingenieur
Twigeater? -
Removing port from channel-group
I've run into an odd issue with port aggregation where I decided to remove a port from a port channel and put it into another but in my SNMP tool it still belongs to the old port channel and the new simultaneously.
The port channel was created by using:
(config)#interface gigabitEthernet 1/0/22
(config-if)#switchport mode trunk
(config-if)#channel-group 1 mode active
And then changed through
(config)#interface gigabitEthernet 1/0/22
(config-if)#no channel-group 1 mode active
(config-if)#channel-group 2 mode active
I also get this when I pull information on etherchannel.
#show interfaces gigabitEthernet 1/0/22 etherchannel
Port state = Up Mstr Assoc In-Bndl
Channel group = 2 Mode = Active Gcchange = -
Port-channel = Po2 GC = - Pseudo port-channel = Po2
Port index = 0 Load = 0x00 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port Port
Port Flags State Priority Key Key Number State
Gi1/0/22 SA bndl 32768 0x2 0x2 0x117 0x3D
Partner's information:
LACP port Admin Oper Port Port
Port Flags Priority Dev ID Age key Key Number State
Gi1/0/22 SA 32768 0817.35e4.2c80 26s 0x0 0x2 0x118 0x3D
Age of the port in the current state: 164d:21h:32m:44s
Could this be an issue with my snmp tool (observium) or are there any additional steps for removing a port from a channel-group? Switch restart?
System image file is "flash:c2960s-universalk9-mz.150-2.SE4.bin"Hi,
I would say that this is related to the snmp tool, once you remove the port from the previous channel and added to the new it will belong to that one only, there is no way that an interface will below to 2 different port channels.
Also there is no need to restart the switch or anything like that, you can use the following commands to confirm that the interface is now part of the new channel group:
Show etherchannel summary
Show run interface gi1/0/22
With those commands you will see that the interface belongs to channel group 2, and the command you attached above shows that the interface belongs to po2.
Hope this helps -
Why don't channel-group numbers match on a VSS port-channel link?
Hi All,
I have two 6509's that are VSS'd together via four 10gig links on each side. The configuration was done before I started this job, but in reviewing the configs I see that the 10gbps VSS heartbeat links are port-channeled together on each side, but one side is channel-group 2, while the other end of the bundle is channel-group 1.
I thought that channel-group numbers needed to match on both ends of the port-channel for it to form correctly?
I'm guessing that this has to happen because the switches are virtually one, so you can't put all 8 links into the same channel-group number or there would be nothing to connect to on the other side. Therefore, the "switch virtual link #" command is the real code that tells the switch where the other end of the link is, regardless of channel-group number, correct?Dean,
The channel-group number does not have to be the same on each end. The four ports on switch A have to be in the same channel-group, and the four ports on switch B have to be in the same channel-group, but there's no communication across that line about what the channel-group is called. It's just a name. From a design standpoint it is nice to have them the same on both sides, but it's not always simple to allow for that in the design of a network.
-Jameson -
N5k to N2k channel-groups error
I am getting this error on E1/7 and E1/8..what am I doing wrong?. Thx
interface Ethernet1/7
switchport mode fex-fabric
untagged cos 0
fex associate 101
interface Ethernet1/8
switchport mode fex-fabric
untagged cos 0
fex associate 101
N5k-Edge1-DC(config-if)# channel-group 201
command failed: port not compatible [port mode]
interface port-channel201
description TO-N2K-ROW-1
vpc 201
fex associate 101
fex 101
pinning max-links 1
description FEX101
type "Nexus 2148T"Hi,
The problem here is that I suspect that the channel-group was created before the interfaces were configured as fex-fabric interfaces, and consequently the channel-group is not specified as a fex-fabric port-channel. The simplest solution without have to remove the port-channel, is to simply go under the port-channel inferace and specify 'switchport mode fex-fabric', then go back under the physical interface and add the channel-group again.
Regards
Allan.
Hope this helps, pls rate helpful posts... -
Data plugin to append to channels in different channel groups
Hello
I try to import particel counter data from a text file which is organized in a difficult way:
Data come in blocks with each block taken at one time. Each block consists of a table of tab-separated data. e.g.
(start of Block 1)
04.06.2013 - 16:34:13 - 10s/10 - m
N analysed: 1521 P Sum(dCn): 5444,470 P/cm³
N total: 1521 P Sum(dCm): 1,7536 mg/m³
X [µm] 0,148647 0,159737 0,171655 0,184462 0,198224 0,213013 0,228905 0,245984 0,264336 0,284057
dN [P] 0 0 0 6.155.882 29.521.097 101.420.330 83.226.951 85.545.715 159.120.955 158.057.455
dN/N [-] 0 0 0 0,004048 0,019414 0,066696 0,054732 0,056256 0,104641 0,103941
dN/N/dX [1/µm] 0 0 0 0,305126 1.361.669 4.353.255 3.324.322 3.179.709 5.503.848 5.087.496
dCn [P/cm³] 0 0 0 22.040.393 105.696.730 363.123.274 297.984.071 306.286.127 569.713.408 565.905.674
dCn/Cn [-] 0 0 0 0,004048 0,019414 0,066696 0,054732 0,056256 0,104641 0,103941
dCn/Cn/dX [1/µm] 0 0 0 0,305126 1.361.669 4.353.255 3.324.322 3.179.709 5.503.848 5.087.496
(start of Block 2)
04.06.2013 - 16:34:23 - 10s/10 - m
N analysed: 1071 P Sum(dCn): 3833,350 P/cm³
N total: 1071 P Sum(dCm): 0,3581 mg/m³
X [µm] 0,148647 0,159737 0,171655 0,184462 0,198224 0,213013 0,228905 0,245984 0,264336 0,284057
dN [P] 0 0 0 6.981.271 18.451.972 25.599.194 70.809.673 88.966.677 122.491.615 83.363.748
dN/N [-] 0 0 0 0,006521 0,017234 0,02391 0,066137 0,083096 0,114408 0,077862
dN/N/dX [1/µm] 0 0 0 0,491474 1.208.812 1.560.603 4.017.064 4.696.707 6.017.589 3.811.039
dCn [P/cm³] 0 0 0 24.995.600 66.065.063 91.654.830 253.525.502 318.534.467 438.566.469 298.473.857
dCn/Cn [-] 0 0 0 0,006521 0,017234 0,02391 0,066137 0,083096 0,114408 0,077862
dCn/Cn/dX [1/µm] 0 0 0 0,491474 1.208.812 1.560.603 4.017.064 4.696.707 6.017.589 3.811.039
(start of Block 3)
04.06.2013 - 16:34:33 - 9s/9 - m
N analysed: 1277 P Sum(dCn): 5080,103 P/cm³
N total: 1277 P Sum(dCm): 2,2456 mg/m³
X [µm] 0,148647 0,159737 0,171655 0,184462 0,198224 0,213013 0,228905 0,245984 0,264336 0,284057
dN [P] 0 0 6.983.139 13.137.502 30.294.664 52.503.076 114.177.807 82.937.875 112.476.377 117.880.295
dN/N [-] 0 0 0,005468 0,010288 0,023724 0,041115 0,089412 0,064948 0,08808 0,092311
dN/N/dX [1/µm] 0 0 0,442925 0,77543 1.663.971 2.683.579 5.430.769 3.670.984 4.632.772 4.518.256
dCn [P/cm³] 0 0 27.780.321 52.263.604 120.518.214 208.867.707 454.222.092 329.943.409 447.453.461 468.951.325
dCn/Cn [-] 0 0 0,005468 0,010288 0,023724 0,041115 0,089412 0,064948 0,08808 0,092311
dCn/Cn/dX [1/µm] 0 0 0,442925 0,77543 1.663.971 2.683.579 5.430.769 3.670.984 4.632.772 4.518.256
(This is of course only an excerpt. There may be more blocks and there will be more size channels and more channel groups...)
Now, I want to store the dN values in one channel group, the dN/N in the next group etc. There should be 10 channels, one for each size class, and the data from the various blocks as sequential values in these channels. (I hope I wa able to explain this in a comprehensoble way...)
I can generate the groups and the respective channels:
set oChn = ochngrp.Channels(2) 'Der Kanal mit den mittleren Dm wird für die Kanalnamen der Gruppen weiterverwendet
for i = 1 to 25
sMyLine = file.getnextline
aChnData = split(sMyLine,vbTab,-1,vbTextCompare) 'Read one line and parse it into an array
if not Root.ChannelGroups.Exists(aChnData(0)) then 'test if a group named like array(0) exists
Set oChnGrp = Root.ChannelGroups.Add(aChnData(0)) ' and create one if necessary.
for j = 1 to oChn.Size
call oChnGrp.Channels.Add("" & oChn(j),eR64) 'add empty channels
next
end if
next
How would I read the data?
With a lot of nested i,j-for..next loops, I could read a line via
for j = 1 to root.channelgroups.count
aValue = split(file.getnextline)
for i = 1 to 10
root.channelgroups(j).values(i) = aValue(i)
next
next
' then jump to timestamp of next data block with some skiplines, read timestamp and reiterate
or I could try to read all values for one channel group and use skiplines, e.g.
for i = 1 to root.channelgroups.count
while file.position <> file.size
aValue(j) = split(file.getnextline)
file.skiplines(as many as are between the blocks)
wend
' now I have a 2dim array aValue to transfer into data channels.But how?
file.position = 1
next
Could file.GetStringBlock be of any help?
Has anybody tackled a similar file structure and could give me a clue or some code sniplet?
Thank you...
MichaelHi Michael,
I would just go line by line in the data file and send the array channel values (one value at a time) to the Channel.Values() property of the matching channel name. It's not going to be fast any way you do it in VBScript.
Brad Turpin
DIAdem Product Support Engineer
National Instruments -
Error -2500 while writing new channel groups / channels to tdm-file
I'm creating a tdm-file using the express vis provided by LabView. Everything goes fine in opening the file and setting the file parameters.
When i'm using the write data-express vi to create a new channel group and setting it's parameters i receive an "error -2500" accompanied with the call chain of the vi.
I'm setting the parameters by using a terminal on the express vi and by using the value setting in the express vi configuration. Any ideas what might cause this error?I solved it. I made the error to begine some of the properties names with a number, eg. 1s for 1 sigma. I renamed them to sigma_1s and it works.
-
I have 2 Catalyst 3560 24-port switches (call them switch-a and switch-b). They are linked together with a patch cable and not stacked (the c3750 is stackable but not the c3560). Is it possible to have a port-channel group with 2 ports, where one port is on switch-A and the other one is on switch-B? If not, is it possible if the 2 switches were stackable like the c3750 switches? Many thanks in advance. -Sam
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
As Jody already noted, 3560 (not stackable) no, 3750 (stackable) yes.
Other Cisco stackables, such as the 3650 series, 3850 series and 2960S (and later) series, also allow port channels across multiple physical switches (when stacked).
But, beyond stackables, you could also have a port-channel across two Cisco physical switches, if they were a VSS pair (one logical device, so much like a stackable) or Nexus pair (two logical devices). The latter's vPC (virtual port channel), is the "interesting variant", as, in theory (?) it could be implemented on something like a 3560 or other non-stackable switches, but don't hold your breath. ;) -
Incorrect ouput of "groups" command
I setup iDS 5.1 server on Solaris 9 and client on Solaris8. I created one account (user1) and add it on 2 groups, but I could not get right output by running "groups" command, it only was displayed that this account just exist on one group (primary group). Please help, thanks in advance.
Here is the output on iDS client.
# cat /etc/nsswitch.conf
passwd: files ldap
group: files ldap
# su - user1
$ id
uid=10001(user1) gid=1699(GD699)
$ groups
GD699
# ldaplist -l group GD499
dn: cn=GD499,ou=group,dc=cig,dc=mcel,dc=mot,dc=com
gidNumber: 1499
objectClass: top
objectClass: groupofuniquenames
objectClass: posixgroup
cn: GD499
description: CoE group
uniqueMember: uid=user1,ou=People, dc=cig,dc=mcel,dc=mot,dc=com
uniqueMember: uid=user2,ou=People, dc=cig,dc=mcel,dc=mot,dc=com
BTW, another thing strange really confused me, I also installed "ypldapd" (PADL/LDAP gateway )on Solaris 8 client, the output is right if I added "nis" on "group" line in /etc/nsswitch.conf.At first I tried to set LC_ALL to ru_RU.UTF-8, but the result of sorting was still wrong.
The locale settings are in /usr/share/locale/, and /usr/share/locale/ruRU.UTF-8/LCCOLLATE is a symlink to a latin collation, which does not work for cyrllic characters, of course. You can consider this as bug, I guess.
/usr/share/locale/UTF-8/ does not have LC_COLLATE, so it is equivalent to LC_COLLATE=C, which means sorting strings by considering each string as an array of unsigned bytes, or sorting according to the Unicode code points. This usually gives the correct collation. export LC_ALL=C should have worked as well.
Setting LC_ALL (or LC_TIME) to ru_RU.UTF-8 has an effect that the date is output in Russian. for example:
$ export LCALL=ruRU.UTF-8
$ date
среда, 17 марта 2010 г. 02:45:07 (JST)
$ ls -ld /
drwxrwxr-t 31 root admin 1122 14 ноя 22:24 /
If you want to keep this behavior, then set only LC_COLLATE to C
$ export LCALL=ruRU.UTF-8
$ export LC_COLLATE=C
or create an alias like
alias sort='LC_COLLATE=C sort' -
Channel grouping or stereo downmix
a bit confused about the differeence between channel grouping or stereo downmix in the audio settings of the sequence settings. i've used channel grouping forever but it came up that maybe i should be using stereo downmix sice the ultimate output is stereo. for example in my current project i'm using using 4 channels on the timeline. channels 1 & 2 are stereo, panned left & right (though not linked since levels are different for each). channels 3 & 4 are centered. would there be a difference in the outputed audio. tried it both ways and sounds the same.
Hi,
If Express features the "grouping" feature for
channel tracks, then you can use it.
(Pro)Manual, page 276, subheading "Groups"
Cheers
Hi and thanks for the reply,
Search as I may it appears Logic Express has no Grouping feature and there is nothing in the Express manual regarding grouping. I guess it's one of the reduced features compared with Pro.
Thanks
macbook Mac OS X (10.4.7) -
Channel-group mode for VSS MEC link to WLC
Hello
I have a Cisco 5508 WLC with LAG enabled - this LAG connects to a single VSS chassis (VSS etherchannel mode is "on" as per the WLC documentation)
I'm looking to spread this LAG across both the VSS chassis - Cisco's VSS best practice document below states that for Multi Chassis Etherchannel "Do not use on and off options with PAgP or LACP or Trunk protocol negotiation"
http://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-virtual-switching-system-1440/109547-vss-best-practices.html
Is anyone else connecting a WLC LAG to a VSS MEC and if so what channel-group mode are they using?
Thanks
AndyHi,
I have never connected a WLC to VSS, but WLC should be threaded just as an access switch and use LACP or PAgP to connect to both VSS switches.
HTH -
Hello all,
I had to use the no. of distribution channel in COPA assessment so tell me how i can create the distribution channel group.
suggest,Hi Prem ,
You can create it in Combine Distribution Channel in Basic Function,
Regards,
Sai -
Change channel group mode without down time.
Hi All,
I'm trying to find a way to change the channel group mode on our access switch from mode on to mode active.
The port on access switch and core switch are configured like this : channel group X mode on
The goal is to change this config to channel group X mode active with no down time of the switch.
Please let me know if you have any ideas to do that.
Fabien.I don't think its possible to change a Channel Group Mode without downtime.
Changing from On to Active will cause the port to start sending LACP messages in order to form an LACP Port-Channel.
As you are taking a link down, I suspect spanning-tree will also try and reconverge.
The downtime should be fairly minimal though, do you have a maintenance window? -
Create Channel group under an existing Channel group in storage vi
Hello
Is there a way to Create a Channel group under an existing Channel group
Ex.
Channel Group 1
Channel 1
Channel 2
Channel Group2
Channel 1
Channel 2
Channel Group 3
Thanks
DanHi Dan,
I'm not sure that I understand what you are trying to accomplish. Do
you want to have a Channel Group inside a Channel Group? That is not
possible with the TDM model, since it's restricted to Channels inside
Channel Groups.
Does that answer your question? If not, please be more specific, thanks.
- Philip Courtois, Thinkbot Solutions
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