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How Extreme Networks support dual homing of its switches to a backbone network?


Hi,

Does Extreme Networks support dual homing (or multi-homing) of its switches to provide redundancy in a network?

Does it support multiple Virtual Private LAN Service instances on virtual connections (e.g. pseudowires)?

Thanks,
Praveen

6 replies

Userlevel 7
Hi Praveen,

Extreme Networks does support dual-homing and multi-homing in many different ways for both Layer 2 (e.g. MLAG, EAPS, ERPS, STP variants, ...) and Layer 3 (e.g. OSPF, IS-IS, BGP, BFD, VRRP, ...).

Multiple variants of VPLS multi-homing are supported as well, see e.g. the MPLS chapter of the EXOS User Guide.

Thanks,
Erik
Userlevel 7
Hi Praveen,

to expand a bit on the VPLS part of your question:

VPLS is supported by EXOS. VPLS provides a multi-point to multi-point layer 2 VPN. This alone allows multi-homing of devices, as long as there are no layer 2 backdoor links. The case of backdoor links, i.e. layer 2 connections of VPN sites that do not use the VPN, is quite common, and EXOS provides different variants to deal with backdoor links using both standard (STP) and proprietary (ESRP, EAPS) protocols.

If you need to scale a VPLS deployment, EXOS provides support for H-VPLS (hierarchical VPLS) as well.

I am not sure if I answered you VPLS question... If you need to specify a transport LSP used by several VPLS and/or VPWS services, you can do so.

Thanks,
Erik
Hi Erik,

Thank you for the information. You response led me to the following link which I actually needed:

http://documentation.extremenetworks.com/exos_16/EXOS_16_2/MPLS/c_vpls-eaps-redundancy-overview.shtm...

Regards,
Praveen
Hi Erik,

Could you please help me with 1 more query on the above discussion?

With reference to the following link:
http://documentation.extremenetworks.com/exos_16/EXOS_16_2/MPLS/c_vpls-eaps-redundancy-overview.shtm...

I have seen a similar configuration in IETF Request for Comments 6870 (Figure 3. Multiple Multi-Homed CEs with SS-PW Redundancy). Link: https://tools.ietf.org/html/rfc6870

Does Extreme Networks support RFC 6870 technology in its products? I did a search on Extreme Networks website but did found direct link with RFC 6870.

Thank you.

Regards,
Praveen
Userlevel 7
Hi Praveen,

I have not been aware of RFC 6870, Pseudowire Preferential Forwarding Status Bit, thanks for the pointer. 🙂

As far as I can determine EXOS does not seem to support this RFC. The RFCs supported by EXOS are usually listed in the EXOS data sheet.

I did not find a reference to this RFC in the data sheet, the user guide, the command reference, or the EXOS 22.3 release notes.

Regards,
Erik

[Edited to add name and link to RFC 6870]
Hi Erik,

Thank you for all the information on my query. It's great to be associated with you on a technical network.

Regards,
Praveen

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