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

Author: Samurn Taukree
Country: Niger
Language: English (Spanish)
Genre: Literature
Published (Last): 13 June 2010
Pages: 407
PDF File Size: 19.56 Mb
ePub File Size: 9.88 Mb
ISBN: 279-4-36206-496-4
Downloads: 75032
Price: Free* [*Free Regsitration Required]
Uploader: Doktilar

R-SMLT takes care of packet forwarding in core router failures and works with any of the following protocol types: Link aggregation or MLT allows multiple smllt network links between two network switches and another device which could be another switch or a network device such as a server to be treated as a single logical link and load balance the traffic across all available links.

Share Tweet Share Share. Multi-link trunking MLT is a link aggregation port trunking technology developed at Nortel in Send Back to overview. ERS config -if vlacp port 1,2,3,4 fast-periodic-time Should any one switch, port, or more than one link fail, the DSMLT technology will automatically redistribute traffic across the remaining links. ERS config -if spanning-tree bpdu -filtering timeout 0.

ERS config -if vlacp port 1,2,3,4 timeout-scale 5. In the event of a link failure to a closet then a large portion of traffic may need to traverse the IST to get back to resources servers, etc physically attached to that core switch. If you accept or continue browsing you agree to our cookie policy. This is just one of many defense mechanisms available to help protect your network. 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.


Salett December 17, Nortel recommends always using DMLT when possible. CP-Limit will shutdown the link to try and protect the core network.

United States Patent [8].

What is a MLT, DMLT, SMLT, SLT or IST?

This produces server to switch or switch to switch connections that are up to 8 times faster. You should repeat the commands above in Step 2 on both Avaya Ethernet Routing Switch s, substitute the appropriate IP address and ports. ERS config interface FastEthernet Thanks for the comment!

Hi Micheal, i just have a problem, 2 ers working with smlt but, second ers ip address renewing but very slow First main system v3. Using this technology allows or enables the use of several links from 2 up to 8 and combined them to create increased bandwidth and several fail-over paths. If LACP is not avya, your command is good.

You are commenting using your Twitter account. The use of SMLT not only allows traffic to be load-balanced across all the links in an aggregation group but also allows traffic to be redistributed very quickly in the event of link or switch failure.

Here is a diagram of the topology for this implementation:. To find out more, including how to control cookies, see here: By ensuring all devices have SMLT connections to the aggregation switches, traffic never needs to traverse the IST and the total forwarding capacity of the switches in the cluster is also aggregated. Role Private Only you and moderators can see this information.


The two core switches use the IST to share L2 learned information, so they appear as one. This is a best practice recommendation by Avaya to help reduce the ARP broadcast storms that can result when the FDB table expires a large number of entries which then in turn causes them to be removed from the ARP table causing the switch to re-ARP for them.

MLT on Exos to work with Avaya MLT/SMLT

Learn how your comment data is processed. This can be a valuable defense measure in protecting your network.

Thanks for any insight. In other projects Wikimedia Commons. To include ports as trunk group members of an MLT, you aavaya statically configure the ports. You can refer to this post for additional details regarding how to configure avaja edge switch. This high speed recovery is required by many critical networks where outages can cause loss of life or very large monetary losses in critical networks.

Why would a virtual machine route its traffic via one of the Core switches instead of the other? The user traffic traversing the IST is minimized to a large degree but it can occur on occasion.

DMLT allows the ports in a trunk MLT to span multiple units of a stack of switches or to span multiple cards in a chassis, preventing network outages when one switch in a stack fails or a card in a chassis fails.

Leave a Reply Cancel reply Enter your comment here