Layer 3 Etherchannel on C2960X

Hello all,
Does Cisco 2960X catalyst switches support Layer 3 Etherchannel ?
I went throught the datasheet, where it mention of supporting Etherchannel technology only.
Can any body confirm it to me please that does it support layer 3 etherchannel or not ?
Following is the exact part number of device from BoQ
WS-C2960X-48FPD-L
Catyalyst 2960-X 48 GigE PoE 740W, 2 x 10G SFP+
Regards,

2960-X only has LAN Base. This has very limited Layer 3 functionality.
2960-XR, however, has IP Lite and can do some routing stuffs. In my opinion, if you want Layer 3 etherchannel, 2960-XR is your choice.

Similar Messages

Layer 3 etherchannel - load 0x00

folks
i have a quick question i'm hoping you can help with
i have a layer 3 etherchannel between 2 * 3750G stacks, both clusters use gi1/0/25 and gi/2/0/25 for the etherchannel and both are set as 'on'
i have traffic passing over the link but i get the following output from a show etherchannel detail
there are no bits being recorded and the load is 0x00
can someone help to explain this please?
thanks to anyone taking the time to reply
Group: 10
Group state = L3
Ports: 2   Maxports = 8
Port-channels: 1 Max Port-channels = 1
Protocol:    -
Minimum Links: 0
                Ports in the group:
Port: Gi1/0/25
Port state    = Up Mstr In-Bndl
Channel group = 10          Mode = On              Gcchange = -
Port-channel = Po10        GC   =   -             Pseudo port-channel = Po10
Port index    = 0           Load = 0x00            Protocol =    -
Age of the port in the current state: 10d:01h:43m:57s
Port: Gi2/0/25
Port state    = Up Mstr In-Bndl
Channel group = 10          Mode = On              Gcchange = -
Port-channel = Po10        GC   =   -             Pseudo port-channel = Po10
Port index    = 0           Load = 0x00            Protocol =    -
Age of the port in the current state: 10d:01h:43m:54s
                Port-channels in the group:
Port-channel: Po10
Age of the Port-channel   = 10d:01h:45m:24s
Logical slot/port   = 10/10          Number of ports = 2
GC                  = 0x00000000      HotStandBy port = null
Passive port list   = Gi1/0/25 Gi2/0/25
Port state          = Port-channel L3-Ag Ag-Inuse
Protocol            =    -
Port security       = Disabled
Ports in the Port-channel:
Index   Load   Port     EC state        No of bits
------+------+------+------------------+-----------
0     00     Gi1/0/25 On                 0
0     00     Gi2/0/25 On                 0
Time since last port bundled:    10d:01h:43m:54s    Gi1/0/25

Hi,
I guess this is just a hardware limitation on the 3k platforms (ASICs).

Layer 3 Etherchannel

Good Day.
How do I get Layer 3 etherchannel to communicate with my Management VLAN ? My etherchannel is Up Up, but my VLAN stays DOWN DOWN.
Any help will be much appreciated......
Here is a sample of my configs
Core 6807 XL
interface Port-channel50
no switchport
ip address 10.34.0.2 255.255.255.254
ip ospf network point-to-point
interface TenGigabitEthernet1/2/1
description # Link to Distribution 0 West Wing #####
no switchport
no ip address
ip ospf network point-to-point
channel-group 50 mode on
interface Vlan60
description # Management VLAN #####
ip address 10.34.1.1 255.255.255.224
no ip route-cache
router ospf 100
router-id 10.34.0.129
log-adjacency-changes
nsf
network 10.34.0.2 0.0.0.1 area 0
network 10.34.0.129 0.0.0.0 area 0
network 10.34.1.0 0.0.0.31 area 0
Distribution 4900
interface Port-channel50
description # Uplink to Core Switch #####
ip address 10.34.0.3 255.255.255.254
ip ospf message-digest-key 10 md5 7 1104391103005A0E577E7C
ip ospf network point-to-point
flowcontrol receive on
interface TenGigabitEthernet1/1
description # Uplink to Core Switch #####
no switchport
no ip address
ip ospf message-digest-key 10 md5 7 03097B1F121D704E1D5D4E
ip ospf network point-to-point
channel-group 50 mode on
interface Vlan60
description # Management VLAN #####
ip address 10.34.1.34 255.255.255.224
standby 60 ip 10.34.1.33
standby 60 priority 108
standby 60 preempt
router ospf 100
router-id 10.34.0.133
log-adjacency-changes
redistribute static subnets
passive-interface default
no passive-interface Port-channel50
network 10.34.0.2 0.0.0.1 area 0
network 10.34.0.133 0.0.0.0 area 0
network 10.34.1.0 0.0.0.31 area 1

An SVI will only come up if an active Layer 2 ports either exists in than Vlan (i.e an access port) or a Trunk port which carries that Vlan tag.
Your connections to other switches are Layer 3 (i.e they have an IP address) so as far as the switch is concerned, the SVI is not needed as there is no active ports requiring it.
A vlan is a layer 2 entity so it will not be tagged across your Layer 3 link, hence why the SVI believes its not yet needed so stays down.
If you just need an IP address for management of the device then use a Loopback interface as they are virtual also but do not require an active Layer 2 link to come up.
Thanks

Layer 3 Etherchannel and MPLS MTU

Greetings,
If two 7609 are connected through layer 3 giga etherchannel and 7609-1 sends a frame with 1514 bytes plus two MPLS header to 7609-2, does the command mpls mtu 1522 under the giga etherchannel interface on both routers is enough?
Or it is necessary to add the global command system jumbomtu 1522 and the interface command mtu 1522 under physical gigainterfaces participating on the channel?
Cisco docs say many platforms will accept frames higher than 1500 bytes (up to 24 bytes) to accommodate control flags; that is why I am considering just mpls mtu xxx is enough.
Also, reading Cisco doc I understood that system jumbomtu xxxx and mtu xxxx should be used together. I tested sending frames higher than 1514 bytes (without MPLS tags) and system jumbomtu xxxx alone was not enough, ping failed; it was necessary to add mtu xxxx under the interface. Do you have a different experience?
Thanks,
Alaerte Gladston Vidali
IBM Global Services - SO
Tel.55+11+2121-2879 Fax:55+11+2121-2449

Hi
We had some peculiar exp with 7600 (7609/7606) boxes in which we did change the physical mtu of the interface instead of mpls mtu.
Again that did the trick for us even in 7200 where we monitored the same kinda behaviour..
regds

Gigabit EtherChannel between 6509 and Intel Pro/1000 MTx

I am trying to configure gigabit etherchannel to connect our backup server with a 6509. The Intel Pro/1000 MT nic in the server has two gigabit ports and supports teaming using LACP. I have configured two gig ports on the 6509 as layer 2 etherchannel ports ( channel-group 2 mode active ). The switch ports always show up as disabled. I can't seem find any documentaion on connecting server to switch using etherchannel ( although the Intel Pro MT nic documentaion does mention it ). Does anyone have experience doing this ?

We always just use load balancing on the Intel NICs and do nothing with the switch but make sure that the ports are in the correct vlan.
We have been using this for over 3 years flawlessly.
Our switches are a Cat4006 and Cat4506.

Etherchannel over MPLS

We receive Layer 2 MPLS VPN services from our Service Provider from our main site to our data center a few miles away. When I do a sho cdp nei, I can see the distant end. My question is, can I do a Layer 3 etherchannel configuration between these two devices? My current setup is two 1 gig uplinks from the main site to the Provider Edger router and two 1 gig uplinks from the data center to the Provider Edge router running OSPF, load balancing between the two links.

Hi Mohamed,
Actually, it works:
1- With latest HW and SW on 7600/GSR, you can terminate the etherchannel on the PE. You can apply the xconnect on the port-channel interface but only the ON mode is supported (no LACP or PAGP). It's due to the fact that those packets will be transparently send into the PW which will prevent the PE to build up the etherchannel.
2- Or ou apply the xconnect on each physical interface (one PW per link) which should allow you to have an end-2-end Etherchannel.
HTH
Laurent.

Etherchannel config

When configuring an etherchannel one a switch as a layer 2 channel. Does on configure the logical interface using "interface port-channel 1" command?
As a layer 3 channel its necessary to use the command to bind the logical interface to the physical using the "channel-group 1 mode auto" command. Are they configured differently?
Just need help with the difference.
Thanx.

Hi Friend,
You don't need to configure "interface port-channel" command for layer 2 etherchannels.
Once you configure "channel-group mode" command under interface configuration mode , interface port-channel will automatically be created with same number which you will used to configure channel-group.
Check this link for more details
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12120ea2/2950scg/swethchl.htm#wp1033981
HTH
Ankur

Etherchannel Load-Balance

Hi All,
I have one Catalyst 6509 connected to Catalyst 4500X-VSS using a Layer 2 Etherchannel.
So, 6509 are using src-dst-ip for Etherchannel Load Balance and 4500X are using src-dst-port.
Anyone knows if this will work fine or if I may have some problem?
Is recommended change that configuration or not?
Tks.

I agree with Karsten, That there would be any problem.
As you know Etherchannel is kind of load sharing among the links...It has its own way of load sharing/balancing the traffic if you leave it to default. (which means you might end up using the same link most often times if you dont change the default load balancing method). Hence we see people change the default method to the one which they want and get the nearest load sharing/balancing over the links utilization.
HTH
REgards
Inayath

Etherchannel for fallover trunks

I was told that it is a good idea to run etherchannel on my trunk links so if one interface goes down it will still work, is this true and how would i configure it ?

Hi!
It is indeed a good idea to do that. The resiliency is better. It is upto you whether to configure a Layer 2 or a Layer 3 etherchannel. Although in your case I believe a Layer 2 etherchannel should suffice.
For configuring etherchannel, you need to enter the following commands:
- enable
- configure terminal
- interface 'type' 'no'
- switchport mode access trunk
- switchport access vlan 'no'|
- channel-group 'channel-group no' mode desirable
You need to enter these commands for every interface you want to be as part of etherchannel.
For more, please refer the following link -->
http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_guide_chapter09186a00801f0a49.html#1033981
Hope that helps.
Regards,
AbhisheK
Please rate all posts!

Question about configuring Etherchannel on Catlyst 3750

Hi, I have a stack witch catalyst 3750, I mean I have 3 switches ( 1 master, 2 slaves)
My question
Can I configure an etherchannel having 2 interfaces on each switch?
How can I do this?
Thanks
Regards

If you have a stack it should present itself as a single switch just put channel-group 1 desirable nonsilent if you are going to another cisco on each of the interfaces you want in the channel . this is for a layer 2 etherchannel . For a layer 3 etherchannel is somewhat more involved and too long to write here , just go to the cisco.com site and search on configuring etherchannels,3750 .

WLC 5508 intermittent loss of connectivity

Hi.
I have a WLC 5508 connecting directly to a distribution switch (3850) via a layer 2 etherchannel trunk fibre link with LAG enabled on the WLC.
Whenever there is a loss of power to the server room where both devices are hosted & power later gets restored, the distribution switch & WLC lose Layer 2 & 3 connectivity. Connectivity only gets restored when the WLC is power cycled or the fibre cables connecting to its SFP ports are removed & plugged back in. When this is done connectivity is restored between them, APs associate etc. Once there is a loss of power to the room for whatsoever reason again, the loss of connectivity issue re-occurs.
Disabled the etherchannel at some point, using only a single fibre trunk link between them, but the issue persists.
Also check for interface errors, CRCs, etc on both ends but there are none.
Can anyone please advice me on what the issue is & what can be done to permanently resolve this?
Thanks in anticipation.
Ope.

Software version is 7.4.100.0
int gig1/0/5
switchport mode trunk
switchport trunk encapsulation dot1q
channel-group 1 mode on
int gig1/0/6
switchport mode trunk
switchport trunk encapsulation dot1q
channel-group 1 mode on
Port setting on the switch is set to auto-negotiate. Port setting on the controller is "auto". The link has been negotiated (& always negotiates) to 1000Mbps full duplex on both ends.
Presently in transit with no way of connecting to the device, but I checked the duplex & speed settings on both devices which was appropriately negotiated. Also checked for interface error counters on the switch, there was none. Checked the WLC logs too, there were no logs on issues with the interfaces or auto-negotiation.

Collapsed core network design

I am a consultant, currently a CCNA studying for the CCNP, and I have been mandated to design the network infrastructure for the corporate head office of a mid sized company.
My design is based on a collapsed core network, with 2 x 4900M Switches as the core/distribution and a bunch of 2960S switches for each floor of the building.
While reading the CCNP book, I noticed I had a design 'flaw'... Like the partial diagram below (this is not the actual design), I was planning on linking the two 4900M with a layer 2 etherchannel, and using 1 MST region with 2 instances to split the VLANs between the two core switches.
The CCNP curriculum recommends using a Layer 3 link between the core switches. I'm not sure what the benefit of doing so would or the drawback of using Layer 2 is? Any input would be more than appreciated...
Thanks,
Marc

I understand that it reduces the chances of loops, but spanning tree is still required/running no? I'm going to lab this today and come back with observations or questions if I have any
Thanks for your time,
Marc

WAAS Design Help Needed - URGENT!

Hi,
I am currently designing and implementing a WAAS solution for s client in their Data Center. It is deployment of a single Accelerator and one CM.
It has been decided that the WAAS accelerator (7341) will have its two NICs connected to two of their core switches (both 6500). The two core switches have a Layer 3 Etherchannel link between them and are running OSPF for network convergence (i.e. Layer 2 connectivity is not used).
I am facing a problem in the design, since I know that the Active/Standby configuration for the accelerator would require a redundant gateway via HSRP (at least) but this is not possible in a routed environment in the core switches. Furthermore, I am to run WCCPv2 for redirection.
Therefore, I am confused as to how to proceed in such a case considering that I can only configure one default gateway on the accelerator when I need high availability on two different subnets.
Please assist at your earliest.
Thanks.

Amir,
Considering your question below
"I am facing a problem in the design, since I know that the Active/Standby configuration for the accelerator would require a redundant gateway via HSRP (at least) but this is not possible in a routed environment in the core switches. Furthermore, I am to run WCCPv2 for redirection."
Do WAE is configured for Standby interface and is this your Primary Interface as well? If answer is yes then see below
You will need a common VLAN for WAAS on both 65K swicthes in order for Active / Standby interface to work properly.
1: When using OSPF make sure your tcp flows has both ingress and egress flows transit from same switch
2: Use Generic GRE method for Egress under WAAS intercept configuration.
Since you are running WCCP each swicth will be able to redirect its TCP traffic via GRE Tunnel to WAAS and WAAS will send the packet back to the same swicth. This will ensure packet path is not modified when WAAS / WCCP is introduced.
Also make sure that you do not have any WCCP redirect on Layer 3 connection between 2 swicthes. Let me know if this helps.
Ahsan Khan

Configure Trunk carrying same Vlans on two separate uplinks on Cisco 3845

Hi,
I need to carry 2 vlans(x & y) in a trunk to two separate redundant devices uplinked to Cisco 3845 on Fa1/0 and Fa1/1. I know I can create sub-interfaces on one of the uplink interfaces(i-e Fa1/0) with 2 distinct 802.1q vlans(Fa1/0.x & Fa1/0.y). But is there a way I can carry same vlans(x & y) trunked to my 2nd redundant device uplinked on 3845 from Fa2/0 ? If not then how should I get the 2nd redundant device uplinked to this 3845 router.
Any tips.. ?
Thanks for your help and suggestions.

IF both links are going to the same device then you can create a Layer 3 Etherchannel.

Need ASA 9.x Etherchannel example w/ layer 2 switch config

Hello there:
Could anyone please point me to example configurations of Etherchannel on an ASA 9.x, connecting to a layer 2 switch? I need to see how the switch is configured as well.
Thank you.

Hi,
I have configured Port channel with Cisco 2960S switch. Here is the below configuration example. If the answer is correct please Comments.
fw-01# sho port-channel summary
Flags: D - down P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
U - in use N - not in use, no aggregation/nameif
M - not in use, no aggregation due to minimum links not met
w - waiting to be aggregated
Number of channel-groups in use: 1
Group Port-channel Protocol Span-cluster Ports
------+-------------+---------+------------+------------------------------------
11 Po11(U) LACP No Gi0/1(P) Gi0/0(P)
interface GigabitEthernet0/0
description *** Connected to CORE-SW-01 ***
channel-group 11 mode passive
no nameif
no security-level
no ip address
interface GigabitEthernet0/1
description *** Connected to CORE-SW-01 ***
channel-group 11 mode passive
no nameif
no security-level
no ip address
interface Port-channel11
description *** Connected to CORE-SW ***
nameif outside
security-level 100
ip address 10.98.8.90 255.255.255.248 standby 10.98.8.91
================Switch====================
interface Port-channel12
description *** Port-Channel Used for DC-INSIDE-FW-1-IPS***
switchport access vlan 912
interface GigabitEthernet1/0/21
description **** inside Firewall 01 ***
switchport access vlan 912
channel-protocol lacp
channel-group 12 mode active
Please let me know your topology.

Layer 3 Etherchannel on C2960X

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