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Questions tagged [ieee-802.1ax]

For questions about Link Aggregation Control Protocol (LACP); IEEE 802.1AX.

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35 views

using 802.1x with nic teaming

I am working on a project which is mandatory to have each pc configured with two network interface cards as a nic team. I want to use 802.1x for authentication with a radius server like cisco ISE. My ...
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1answer
61 views

HPE IRF Stack why do I need two physical ports?

I'm building exactly the same topology, but there is no explanation why do I need two physical interfaces in IRF stack? So, can someone please explain me, why do I need two physical members in IRF ...
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1answer
152 views

Can I aggregate multiple uplink ports between Ethernet switches?

Disclaimer: I'm not a network engineer; I just have to try to do a good-enough impression to solve this problem. We have two rooms in our office. In the first, I would like to put a large copper 10-...
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1answer
85 views

How can I configure link aggregation/bonded LAN for my simple Ubuntu router build? [closed]

I'm spinning out on this one...! Someone please help! I followed this fab tutorial below to make my own Ubuntu based router: How to build a simple router Ubuntu Server 18.04 Which works great using ...
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2answers
275 views

Network Redundancy with LACP Trunking

I would like to set up a redundant link between two switches. I have four ports available to accomplish this. Scenario A: Switch 1 has ports 1+2 trunked together via LACP. They are plugged into ...
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2answers
99 views

Spine and Leaf architecture with LACP

In a spine and leaf architecture with Link Aggregation between spine and leaves (active-active) like this: Do we have the same active-atcive link aggregation between the leaf and the server? Is the ...
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1answer
64 views

what will change in a trunk between lacp mode and trunk mode?

I need to link two HP switch with multiple port for throughput purpose. they are different models but same generation. I could use either trunk 37-40 trk1 lacp or otherwise trunk 37-40 trk1 trunk on ...
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1answer
60 views

LACP to Fix Switch Bottleneck?

I have a bottleneck affecting traffic. There are 4 switches with each of them running a line to the next to provide internet. I haven't played around with LACP LAG too much and am wondering if the ...
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2answers
964 views

Layer3 vs Layer2 LACP

We have ISP link 4x10G LACP Layer2 and now we are upgrade to to 8x10G LACP, currently i have created VLAN interface to terminate that link because it L2 Now i have option to decide to go with L3 or ...
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1answer
143 views

LAG - MAC address, IP address, VLAN assignment

I want to ask some questions related to Link Aggregation Group - LAG: Can LAG be configured in Active Standby Mode? Or can LAG only be used in the standard operation as Load Sharing mode? What will ...
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2answers
515 views

LACP Huawei S6720

Once here I ask about LACP between rb750 and huawei ne20, as @Zac67 said "throughput for multiple flows, not for a single flow" . I was testing from a single flow, now is working, but I came ...
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1answer
135 views

LACP: Between RB750 and Huawei Ne20

I'm making a test to create a PORT AGGREGATION between my RB750 and Huawei NE20. Rb750: Flags: X - disabled, R - running 0 R name="bonding1" mtu=1500 mac-address=D4:CA:6D:1D:6F:66 arp=enabled ...
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1answer
1k views

Bridge Assurance with vPC on port type network

I'm running two Nexus 3048 switches as network core and I got an issue when linking another switch (specifically a 2960-X) on the vPC links. Consider the scenario: +-------+ +-------+ | NX #1 |===|...
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1answer
1k views

LACP and how to configure switches correctly

I want to set up a fast network and am considering options. I want a backbone switch that connects all my switches together. I can see options for SFP / SFP+ ports. Some SFP ports are 1 or 2 Gb from ...
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1answer
48 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 ...
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1answer
3k views

show mac address on aggregated interface - Junos

I am trying to audit which interfaces are plugged to which switchport on our EX3300 switches. The problem is that when using aggregated interface I see only one mac address. wadmin@SIN11-VCsw-48-11&...
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1answer
184 views

LACP balanced VPN: Bad or good idea?

Imagine I have a computer with two slow cheap internet connections from ISP A and B. I also have a VPS in a datacenter with very high infinite bandwidth. I can make two VPN's. One from A to VPS and ...
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1answer
380 views

Linux LACP (802.3ad) working for ingress traffic only?

We've setup LACP (802.3ad) on our Juniper switch and a Linux host, connected to the switch with 3x 1Gbps links. We are able to download from multiple sources at a rate of 3 Gbps, but when uploading ...
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1answer
228 views

The impact of LAG/LACP hash method and load balancing configuration on QoS

I've been looking for information regarding LAG/LACP configuration and the impact on QoS (such as packet delay, out of order delivery, etc.). I could only find statements such as "LAG/LACP guarantees ...
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1answer
5k views

Cisco 2960 etherchannel suspended mode

Here is the configuration: Current configuration : 154 bytes ! interface Port-channel1 description TRUNK switchport trunk allowed vlan 10,20 switchport mode trunk end interface GigabitEthernet1/0/...
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3answers
148 views

Increase network bandwidth

I have similiary situation like in question Increase transfer rate with Link Agreggation But with some different purposes - need increas backup speed. ServerA - backup media server (Win2008r2); ...
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3answers
75 views

Possibilities to switch between primary and backup radios between locations

What are the possibilities of connection/link failover in the following configuration: 2 geographic locations connected by 2 independent radios (a primary and a backup, the backup is a mikrotik device)...
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1answer
463 views

What is the difference between 'clock synchronization' and 'time synchronization'?

Is there have any difference between this two terms, 'Clock Synchronization' and 'Time Synchronization' in a network? I understand that when clock frequency has corrected to run in same pace is called ...
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1answer
499 views

LACP static on HP Switch with multiple VLAN

I need to connect a 8 interfaces server to a HP J9854A 2530-24G-PoE+-2SFP+ Switch with LACP. Several VLANS are involved. It seems from this link: http://h20564.www2.hpe.com/hpsc/doc/public/display?...
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1answer
247 views

Micro-BFD LAG and OSPF

When configuring a Micro-BFD session on a LAG, is it preferred/recommended to still also tie BFD to the OSPF adjacency that is established over that interface? I would think not as the BFD session ...
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2answers
2k views

Why is there no “round robin” option for lacp (at least on my switches)?

I am trying to increase bandwidth for particular hosts by using lacp on a Cisco Catalyst 4500 switch. However, it seems that I will always end up with the same flow (src/dst mac, ip, and port) being ...
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2answers
866 views

Adding a switch to provide redundancy

I inherited a network laid out (very broadly speaking) as follows: A number of access switches connect to 2 main switches. The Main Switch in the MDF (SW1) connects to the WAN router and is connected ...
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2answers
1k views

MCLag active-active and VRRP

I have a pair of Juniper routers each one having drops from ISP. We advertise same IP blocks from both the routers on WAN interface. Now on the Lan side, we have pair of HP core switch running IRF ...
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3answers
3k views

STP and LAG Problems

I'm having some trouble with STP on our network. I have created a 3 tier network made up of Dell and Cisco switches. The topology is as follows: The core consists of two Dell N4032 10Gbps switches in ...
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3answers
983 views

What iperf flags should I use to test link LACP bond total speed

I have created an channel group with LACP, I know that single TCP session will be sent over a single line. My hashing algorithm is set to source mac address. So how can I be sure that the bandwidths ...
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1answer
2k views

LACP trunk between BNT layer2/3 switch and Cisco 2960s stack on a bladeCenter H

My objective is to replace a Nortel 5520 stack with a stack of Cisco 2960s. The old working configuration was using mlt trunk between 5520 and BNT layer 2/3 switch. I will use LACP for the trunk ...
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2answers
440 views

Port-Channel Interface Configuration EtherChannel and LACP in same Port-Channel

I currently have two links which form a Port-Channel from 1 cisco device to another. I want to change the port-channel config from channel-group 1 mode on to channel-group 1 mode active So that ...
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1answer
1k views

LACP in Stand-Alone between Cisco 3650 Stack & Dell VRTX R1 2210 10gb Switch

LACP between a R1-2210 VRTX 10Gb Switch & Cisco 3650 Stack will not bundle properly. Has anybody seen this/have any ideas? Running what is currently the latest firmware on the VRTX Switch and ...
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1answer
490 views

Can I use 802.1x and LACP to secure the networking infrastructure?

Suppose you have a network like this: +-------------------------+ +---------------------------+ | | | ...
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1answer
580 views

CDP/LLDP over LACP Trunk Several Devices

I have a 4-switch stack of Alcatel Omniswitches connected to an HP 5412 core via 8 uplinks; these are ports D11-D18. Unfortunately, the client did not yet give me access to the Alcatels, but a request ...
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3answers
2k views

Server link bond across 2 switches with LACP, inter-switch LAG dropping alternate pings?

I have a Debian Linux server with 4x 1Gb NICs, 2 onboard and 2 PCI. All NICs are configured into a single mode 4 LACP bonded interface: bond0 I have two switches: Cisco SG300-28 and Cisco SG300-10, to ...
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1answer
2k views

Basic Link Aggregation scenario with high ping latency

Resume: I'm have a really basic network cenario with some new switches that I just bought. After configuring a LAG (without LACP) between them, I started to have ping losses and high latency. I also ...
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1answer
106 views

Do I need a special switch when using Ubuntu bonding in mode 1?

I am looking to have multiple Ubuntu server machines with 3 network cards each, and I am looking into bonding the connections for an increased throughput. Do I require a switch which supports some ...
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2answers
1k views

Juniper trunking with two links (not using LAG)

Some reason I'm drawing a blank on this. Let's say I have two EX switches connected together with 2 links to each other (xe-0/1/0 and xe-0/1/1 on both switches). I can easily setup a trunk on one of ...
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2answers
682 views

Port Group Cisco 2960X + HyperV or any server

First of all thank you in advance trying to solve my issue. I'm trying to Team 4 NICs on HyperV and QNAP server to my switch Cisco 2960X in order to get 4Gbps data transfer rate to backup data faster....
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2answers
1k views

Force10 port channel to server that also supports PXE boot

I have an 802.3ad port channel comprised of 2 10GigE links from a Force10 E1200 switch to a Linux server with one dual-ported 10G NIC. This setup works great when Linux speaks LACP and brings up a ...
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1answer
73 views

Half-Open LACP Implications

I recently had two switches from different vendors, one was an HP 5412 Chassis running ProCurve and the other is an Alcatel 4-Switch stack, have a LACP misconfiguration which brought down a portion of ...
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1answer
3k views

Configuring RSTP and LACP. Unplugging a LACP port causes a topology change and pauses all switch traffic

I am having trouble with configuring LACP and RSTP on a (TPLINK TL-SG3424) switch. If I reboot the VM Server or unplug one of the LACP ports it causes a RSTP topology change that pauses packet ...
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2answers
3k views

Using channel-group mode on in my full Cisco enviroment

this is my first question over here. I have a question about using channel-group mode on or channel-group mode active. I have a core 3750x with 2 stacked SFPs nodes. Each pair of ports of a node ...
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1answer
412 views

Does “lacp port-priority” not work on Cisco Catalyst 3750 series?

I have a Cisco WS-C3750G-12S switch physically connected with ports Gi1/0/1 and Gi1/0/11 to Cisco WS-C3750G-24TS ports Gi1/0/1 and Gi1/0/27 respectively. Ports have different LACP port-priority: WS-...
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1answer
457 views

Cisco SG300-52 SNMP ifInOctets Values Unreasonable

On the SG300-52, I've noticed that SNMP monitoring of LAGs versus regular switch ports give incorrect (way too large and unrealistic) values for the octets transferred. For simplicities sake, let's ...
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2answers
14k views

LACP rate slow vs fast… impact on bandwidth?

Is there any impact on bandwidth when choosing fast (1s) LACPDU timing rather than slow (30s)? Anyone ever bothered to measure? I've always assumed it's negligable, with the simple act of bonding ...
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2answers
3k views

Bond switch uplinks together for double bandwidth between switches

Traditional 802.3ad link aggregation only works when all of the links in the group are going to/from the same devices/switches. So you couldn't have a system with one half of a bonded link going into ...
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3answers
2k views

VM Mac address flapping between two port channel on Cisco switch

I encounter a network problem. My clients can ping the Oracle ERP server but experience frequently session timeout when access to the ERP application. I have configured two port channel to the oracle ...
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1answer
3k views

Do LACP MTUs (or other link-level MTUs) need to match?

Does setting a custom MTU on the host side of a LACP bond require also customizing the MTU on the switch side?