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fanqinying
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Reviewed-by: Hajba, László Antal <laszlo-antal.hajba@t-systems.com> Co-authored-by: fanqinying <fanqinying@huawei.com> Co-committed-by: fanqinying <fanqinying@huawei.com>
23 lines
2.5 KiB
HTML
23 lines
2.5 KiB
HTML
<a name="esw_pd_0002"></a><a name="esw_pd_0002"></a>
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<h1 class="topictitle1">What Is an Enterprise Switch?</h1>
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<div id="body8662426"><p id="esw_pd_0002__p1434656191912">Enterprise switches enable Layer 2 networking for VPCs, helping you to connect cloud and on-premises networks that are highly reliable, in a large scale, and of high performance.</p>
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<p id="esw_pd_0002__p1556310591179">Currently, enterprise switches only support Layer 2 connection gateways (L2CGs). An L2CG is a virtual tunnel gateway that can work with Direct Connect or VPN to establish network communications between cloud and on-premises networks at Layer 2. The gateway allows you to migrate workloads in data centers or private clouds to the cloud without changing subnets and IP addresses.</p>
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<p id="esw_pd_0002__p11091926164418">VPN or Direct Connect only allows cloud and on-premises networks to communicate with each other at Layer 3 and the CIDR blocks of the networks that are used for communication cannot overlap.</p>
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<p id="esw_pd_0002__p205011457123010">If the cloud and on-premises networks overlap and need to communicate with each other, you can use an enterprise switch to enable communication between them at Layer 2.</p>
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<div class="msonormal" id="esw_pd_0002__en-us_topic_0228866524_p55186561">An enterprise switch is a tunnel gateway of a VPC and corresponds to the tunnel gateway of your data center. It can work together with Direct Connect or VPN to enable communications between a VPC and your on-premises data center at Layer 2. <a href="#esw_pd_0002__fig7806391364">Figure 1</a> shows the networking diagram. You need to connect a VPC subnet to the enterprise switch and specify the enterprise switch to establish a connection with the tunnel gateway of your on-premises data center so that the VPC subnet can communicate with the data center subnet at Layer 2.<div class="fignone" id="esw_pd_0002__fig7806391364"><a name="esw_pd_0002__fig7806391364"></a><a name="fig7806391364"></a><span class="figcap"><b>Figure 1 </b>Layer 2 networking</span><br><span><img class="imgResize" id="esw_pd_0002__image15801139183615" src="en-us_image_0000001355818125.png" title="Click to enlarge"></span></div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="esw_pd_0001.html">Service Overview</a></div>
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