Overview of VMware Edge Services Gateway (ESG) and Distributed Logical Router (DLR)

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                          VMware ESG vs DLR




ESG
DLR
-        It’s always a VM.
-        We use ESG for North-South. It means, going outside from datacenter towards the external network or internet.
-        If you have logical switches in different transport zone, then you can use ESG.
-        ESG is for different transport zone, but DLR is for same transport zone.
-        It supports dynamic routing as well as static routing.
-        It supports OSPF and BGP.
-        It supports both the routing protocol at the same time.
-        It is for centralized routing.
-        Since it is a VM, so it can have maximum of 10 interfaces.
-        On one interface, we can have maximum 200 sub-interfaces which will be connected as trunk interface.
-        ESG has internal interface which connects with South. Means, it connects to DLR. (Transit Network).
-        Physical router will be Uplink interface.


-        It’s a kernel module.
-        It splits in to two components.
  1. DLR
  2. DLR Control VM
-        Name of DLR kernel module is nsx-vdrb. It exists on each ESXi hosts.
-        We use DLR for East-West routing. Means, routing within your datacenter.
-        Benefits of using DLR: -
-        If we remove DLR, so where we have router? We have router on each ESXi host.
-        DLR only do routing if logical switches are in same transport zone.
-        When we deploy DLR, it activates on those ESXi host which participate in that transport zone.
-        It supports dynamic routing as well as static routing.
-        It supports OSPF or BGP.
-        It doesn’t support both routing protocol at the same time.
-        It is distributed routing.
-        It has two interfaces as Internal and Uplink. And third uplink is related to management. Total 1000 interfaces.
-        Internal Interface
-        It connects towards the south. With Logical switches.
-        Maximum it can have 991 interfaces.
-        Uplink Interface
-        It connects with either physical router or ESG.
-        Maximum it can have 8 uplinks
-        Management Interface
-        Number of interfaces is 1
-        Total 10000 interface can be on single host.
-        When we talk about cloud then we give one DLR to each tenant. Where they can create logical switches and connect to DLR.
-        Maximum 250 DLR can be on single ESXi host.

Comments

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