Questions tagged [port-channel]

For questions about port channels (or EtherChannels) on network devices, where it is a port link aggregation technology or port-channel architecture used primarily on Cisco switches. For instance, you have two switches connected to each other, but the link is utilized 100%. Therefore you want to upgrade the inter link.

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2answers
33 views

Port cost relation to data rate capacity

Why is it that the allocated port costs lower for links with higher data rate capacity? Since a highter data rate capacity lowers the frame transmission timing, shouldn't it be more costly?
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1answer
90 views

Is it possible to make a truly active\active L3 VRRP\HSRP configuration between two Nexus in a vPC

I'm an admin that is used to working with older Cisco gear, the Catalyst 6500 and the like. This is my first time diving into the world of nxOS. I'm trying to create a truly active\active ...
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3answers
579 views

LACPDU packets to pass through unmanaged switch

I have two buildings connected through the CAT6 cable and both ends have cisco-sg350 (capable of etherchannel). Due to the limitations of the cable both the switches are connected through a unmanaged ...
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1answer
58 views

Is it possible to limit the number of active links in a channel group?

I've got 2x3750 switches with 4 physical links in between. I've bundled all the physical links using PAgP, but I want ONLY 2 links to be active at any single time. How do I go about this?
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1answer
40 views

vpc/mlag block half of uplink?

We want to configure 2 Arista switches by mlag and connect 1 port channeled switch to both of arista's. so in this case, if one of our arista fail the other one will respond. now my question here is ...
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1answer
105 views

Two switches, one uplink - best way to link them?

Overview I have two Arista 7050SX switches. They don't support stacking. But I essentially will be using them as a stacked pair none the less (just means managing two individual switches). They're ...
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1answer
58 views

How TCP find the correct application?

I am learning how TCP and application communicate with each other. I am not sure if my understanding is correct, I will use below example to illustrate my understanding and want to ask some questions. ...
5
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2answers
413 views

Should portfast be configured on the physical interfaces or on the logical port-channel, or both?

I'm using a Cisco 3750 switch and have two physical ports configured in a port channel that connects to a router. Should I configure spanning-tree portfast on the physical interfaces or on the port-...
3
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1answer
189 views

Port Channel Hybrid Port Issue

I have a Dell Sonicwall NSA 4600 running the latest firmware with an Interface that's configured to have a secondary redundant port. This interface also has a VLAN sub interface assigned to it. On ...
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1answer
228 views

Difference between port-channel lacp fallback individual VS. static?

What is the exact difference between: port-channel lacp fallback individual port-channel lacp fallback static
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1answer
800 views

Cisco nexus vpc spanning-tree port type trunk question

I have very strange scenario here which you can see in diagram. SW1/2 is Cisco nexus 3064PQ switch configured in vPC and those switch connected to SW3/4 ( HP 6120XG ) switches on HP c7000 blade ...
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1answer
2k views

spanning-tree port type edge trunk on port-channel vs physical interface

If i configure spanning-tree port type edge trunk on physical interface instead of port-channel does that work? Or i have to do spanning-tree port type edge trunk on port-channel ? Example: ...
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1answer
94 views

Can not add a Physical port into LAG

Using SuperMicro network module, which related to Intel SDN product, the command PDF . and the Web GUI manual. there I have qe57, qe61, qe65, qe69 four upstream ports, I want to aggregate them to one ...
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1answer
6k views

what is the difference between port-channel and etherchannel?

As the title said, I do not make the difference between port-channel and etherchannel. For me they both aggregate ports in an Ethernet networks using Cisco parlance. What subtlety do I miss ?
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1answer
441 views

Will Nexus load-balance method “src-dst-port” help balance link usage between two servers on same subnet?

I'm sending data on multiple ports evenly, but only receiving data on two ports at my receiver. Both servers (on the same tcp subnet) are connected to pair of Nexus 7K switches (I believe they are ...
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2answers
239 views

Multi Chassis Ether Channel Best Practice

in our topology we have our Data Server(Multi Virtual Servers) and Backup Server exist in two different buildings and the current connection between them as below: Connection explanation: *1st ...
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2answers
8k views

Port channel to two different switches

We had a technician move one of two port channel links from an old switch to a new switch before telling anyone. This left the new and old switch both connected to different links of the same channel ...
3
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1answer
645 views

Add links to a port channel group without downtime

There are two trunk links with the same configuration connecting two switches. Currently they are independent links and one is blocked with spanning-tree. I would like to convert these to a single ...
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1answer
3k views

Nexus VPC Peer Link - does it carry unicast traffic?

Read from the doc that the VPC peer link only carry multicast/broadcast traffic under normal circumstances -> The vPC peer link carries control traffic between two vPC switches and also multicast, ...
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1answer
73 views

Possible to do a port-channel and STP with three 10Gbps fibre interfaces?

I have two sites that I'm planning to interconnect via three circuits carrying layer 3. They will be presented via fibre. The bandwidth of the lines will be: 1Gbps, 1Gbps, and 2Gbps. Each SFP will ...
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1answer
51 views

do port-channel members card module must be same?

port-channel 1 is active.members of port-channel are TenGig 1/1 and TenGig 2/1. must Card type and Model on module 1 and 2 be same?
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1answer
50 views

Create a trunk to a device with two NICs but one MAC address

I have a Linux device with two NICs, but they seem to share one MAC address. I want to configure a redundant network connection to a switch stack. Whenever I restart the end device, it is shutting ...
2
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1answer
248 views

Why Ether-channel Index for Both Ports is same ?How Hash algorithm will work?

I have created a Ether-channel between Cisco 35060G and 2960G for practice purpose and to test Load balance . Here is a output from sh ether-channel detail and it shows Index for both the ports ...
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2answers
443 views

How does link aggregation work in reality?

I'm concerned that I'm misunderstanding how aggregators work in the scenario below: I have a project where I need 40 Gbps links between switches. My plan was to have my three switches use all four of ...
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0answers
29 views

When connecting via com port, it doesnt ask login and password [closed]

I have successfully connected to Alcatel OmniPCX device via Serial COM port with help of XShell program to config interface. It says that it is connected. It doesn's ask for login and password. But ...
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1answer
330 views

Ping to radio links attached to port-channels interfaces

I have a L2 port-channel, up and running, between two Cisco switches 3560 and 3750E. Traffic is load-balanced fine by src-dest-ip, but I have one problem: I can't ping the radio links connected to ...
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1answer
81 views

Does link aggregation uses the full bandwidth?

If I setup a 2x 1Gig ports with link aggregation, will I get 2Gigs bandwidth or less? how less? thank you
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3answers
660 views

Triggered removal of members of a port-channel?

Is there a way to monitor conditions (as with ipsla etc) in a switch (or specific to a given port channel) and trigger the removal/shutdown of a member from within a port-channel? Example - after x% ...
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1answer
77 views

Would multiple connections to a network make the connection faster?

So, in theory, if I connected to a network using, say, 30 ethernet cables from the same PC, wouldn't the upload speeds go up exponentially, because it would split the data over all the ethernet ...
4
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2answers
9k views

Help optimize a LAG with LACP and two different algorithms on each side

We have a 4Gb (4x1G) LAG trunk with LACP between two cisco switches (c3850<--->c4948) and i am noticing that it is not doing proper load-balancing. I found SW1 using src-dst-ip algorithm and SW2 ...