Would like to share the introduction series of VxLAN to you--VXLAN Functions-ARP Proxy and Broadcast-to-Unicast Conversion

Created Dec 25, 2018 16:49:14Latest reply Dec 29, 2018 10:58:55 141 5 10 0

Reducing ARP Broadcast on a VXLAN Network — ARP Proxy


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lThe SDN controller obtains VM information from the cloud platform to generate the ARP cache.

lThe ingress NVE obtains the broadcast ARP requests and sends them to the control plane (SDN controller) for processing.

lThe SDN controller parses the ARP requests and queries the ARP cache for the requested destination address.

lIf the destination address is found, the SDN controller unicasts the ARP reply to the destination address and terminates the ARP broadcast packet.

lIf the destination address is not found, the SDN controller forwards the packet to the ingress NVE. The source interface triggers a prune-flood process. The destination host replies to the request.


Reducing ARP Broadcast on a VXLAN Network — Broadcast-to-Unicast Conversion

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lIn this mode, network devices will not terminate ARP requests

lThis mode is recommended for the following reasons:

l1. In addition to address resolution, ARP also provides other functions such as virtual cluster detection and NIC status detection.

l2. The ARP protocol stack implementation may differ on different hosts.

lThis mode can ensure that ARP requests can be received by destination hosts and will not be terminated on network devices.

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yiyi0519  Novice   Created Dec 26, 2018 08:54:08 Helpful(0) Helpful(0)

VXLAN uses UDP to encapsulate Layer 2 packets. It is more flexible and more convenient to maintain than VPLS.
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yjhd     Created Dec 26, 2018 17:02:48 Helpful(0) Helpful(0)

very good
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GongXiaochuan  Adept   Created Dec 28, 2018 11:11:55 Helpful(0) Helpful(0)

The broadcast request is treated as multidestination traffic that is typically VXLAN encapsulated and sent to every VTEP or edge device that is a member of the corresponding Layer 2 VNI. The response to the ARP request is typically sent as a unicast packet to the requestor
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Good Good Study Day Day Up
Torrent     Created Dec 29, 2018 09:44:44 Helpful(0) Helpful(0)

In this mode, network devices will not terminate ARP requests.

lThis mode is recommended for the following reasons:

l1. In addition to address resolution, ARP also provides other functions such as virtual cluster detection and NIC status detection.

l2. The ARP protocol stack implementation may differ on different hosts.

lThis mode can ensure that ARP requests can be received by destination hosts and will not be terminated on network devices.

thanks for sharing, learned a lot.
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Finn92  Novice   Created Dec 29, 2018 10:58:55 Helpful(0) Helpful(0)

The SDN controller obtains VM information from the cloud platform to generate the ARP cache.
lThe ingress NVE obtains the broadcast ARP requests and sends them to the control plane (SDN controller) for processing.

good sharing , mark .
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