An SMLT/SLT is Avaya’s proprietary equivalent to Cisco’s Virtual PortChannel feature. When do you use one over the other, SMLT or SLT?. It was recently pointed out to me that I had never written a post documenting how to configure SMLT to a edge/closet switch. While there are. Multi-link trunking (MLT) is a link aggregation port trunking technology developed at Nortel in . SMLT is supported within the following Avaya Ethernet Routing Switch (ERS) and Virtual Services Platform (VSP) Product Families: ERS

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A general limitation of standard MLT is that all the physical ports in the link avayya group must reside on the same switch. ERS config vlacp enable. It doesn’t really matter for SMLT by itself, but to have a better traffic load-balancing from that switch, pick what you need.

This command will discard any non VLACP parameters must be configured the same on both ends of the link to achieve connectivity. ERS config -if spanning-tree bpdu -filtering timeout 0. ERS config -if vlacp port 1,2,3,4 timeout short. Grouping avya ports into a logical link provides a higher aggregate on a switch-to-switch or switch-to-server application. Previous Post Why two addresses?

ERS config vlan create 30 name mgmt type port.

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Multi-link trunking – Wikipedia

In general the failure of any one component results in a traffic disruption lasting less than half a second normal less than millisecond [2] [3] making SMLT appropriate in environments running time- and loss-sensitive applications such as voice and video.


This automatic redistribution is accomplished in less than half a second typically less than millisecond [1] so no outage is noticed by end users. USFite, Jr. We use cookies to enhance and personalize your experience. Enter your username or e-mail address to receive an e-mail with instructions to reset your password. Avaya recommends using the reserved multicast MAC address of Next create the MLT at the edge: ERS config vlan members add 10Your email address will not be published.

Traffic is split across both links using an algorithm that hashes the source and destination MAC addresses this way the same conversation always flows over the same path. An edge switch uses the SMLT to abaya out a packet that needs to be routed, and that packet due to the traffic hashing algorithms of link aggregation protocols has a small to large chance of hitting the switch in the cluster that is not the VRRP master, so the core switch that received the packet must forward it smly the IST link to the other core switch that is designated as the master.

VRRP with Backup Master solves the problem by allowing routing through either of the core switches so the above scenario does not occur. These will all be covered in detail in other posts. This page was last edited on 31 Decemberat Avay Wikipedia, the free encyclopedia.

Avaya Split MultiLink Trunking (SMLT) Layer 2 Trunking

Can you explain to me how the avaya routing algorithm works when you have 2 x switches in a stack using SMLT connected to 2 x ERS using 4 x 10gbps fibre connections.

Leave a Reply Cancel reply Enter your comment here DMLT allows you to aggregate similar ports from different modules. To find out more, including how to control cookies, see here: Why would a virtual machine route its traffic via one of the Core switches instead of the other? The core configuration is finished! Note – These features should never be enabled on the uplinks MLT, in this case ports xmlt, 2, 3, and 4 from the edge to the core: This produces server to switch or switch to switch connections that avvaya up to 8 times faster.


Now set it up using the following commands: The Rx thresholds are staggered between the two switches, so the primary switch disables its uplinks if a loop occurs.

You can refer to this post for additional details regarding how to configure the edge switch. Fault-tolerant design is an important aspect of Multi-Link Trunking technology. Yes, you are correct. This command will enable DiffServ Layer 3 QoS on the switch port and set it for Trustedso avsya switch will honor all DiffServ marked packets and give those packets the appropriate priority and queuing.

You might also want to read these other posts Scanning file for viruses. Look up MLT in Wiktionary, the free dictionary. Nortel recommends always using DMLT when possible. Retrieved 3 Sep The edge switch should be setup as an MLT. Hi, Can you explain to me how the avaya routing algorithm works when you have 2 x switches in a stack using SMLT connected to 2 x ERS using 4 x 10gbps fibre connections.

Notify me of new comments via email. Distributed multi-link trunking DMLT or distributed MLT is a proprietary computer networking protocol designed by Nortel Networksand now owned by extreme networks[7] used to load balance the network traffic across connections and also across multiple switches or modules in a chassis.

ERS config -if exit.

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