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% Document Info
\author{sh-arista}
\pdfinfo{
  /Title (arista-vxlan-indirect-routing.pdf)
  /Creator (Cheatography)
  /Author (sh-arista)
  /Subject (Arista VXLAN Indirect Routing Cheat Sheet)
}

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\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
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    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Arista VXLAN Indirect Routing Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{sh-arista} via \textcolor{DarkBackground}{\uline{cheatography.com/93954/cs/20885/}}}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}sh-arista \\
  \uline{cheatography.com/sh-arista} \\
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 29th October, 2019.\\
   Page {\thepage} of \pageref{LastPage}.
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  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
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\end{multicols}}




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\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{VXLAN Indirect Routing}}  \tn
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\mymulticolumn{1}{x{8.4cm}}{To route between VLANs which are crossing the VXLAN overlay (also known as "stretched" or "extended" VLANs), Switched Virtual Interfaces (SVIs) need to be added to the VTEPs to perform the routing.  With the indirect routing model, the dest host is not directly attached to the VTEP(s) where the SVIs are configured.  As packets might need to go through multiple hops in the overlay to reach the final destination, this model is called "indirect".  This scales better than direct routing as each VTEP is only responsible for routing a subset of the overlay subnets (fewer ARP entries, fewer routes.)% Row Count 12 (+ 12)
} \tn 
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\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{VXLAN and NAT cannot coexist on a switch.}}  \tn
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\mymulticolumn{1}{x{8.4cm}}{} \tn 
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Simple Topology}}  \tn
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\mymulticolumn{1}{p{8.4cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/sh-arista_1572274613_topology 4 indirect.jpg}}} \tn 
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Troubleshooting}}  \tn
% Row 0
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\mymulticolumn{1}{x{8.4cm}}{{\bf{show interface vxlan 1}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}{\emph{should be "up"; correctly reflect configured VLAN-to-VNI mappings; confirm control plane (multicast, HER, CVX, EVPN)}}} \tn 
% Row Count 4 (+ 4)
% Row 1
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\mymulticolumn{1}{x{8.4cm}}{{\bf{show mac address-table}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}{\emph{The L2 forwarding table should show that mac addresses are either learned locally or from across the VXLAN overlay - "Vx1"; if we are not learning MACs from another VTEP confirm flood list and L3 reachability between VTEPs}}} \tn 
% Row Count 10 (+ 6)
% Row 2
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\mymulticolumn{1}{x{8.4cm}}{{\bf{show vxlan address-table}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}{\emph{Shows the VXLAN MAC info, including the Host MAC, remote VTEP IP, and MAC moves.}}} \tn 
% Row Count 13 (+ 3)
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\mymulticolumn{1}{x{8.4cm}}{{\bf{show ip route}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}{\emph{All VTEP IPs (primary and secondary) should have L3 reachability (ping to confirm)}}} \tn 
% Row Count 16 (+ 3)
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\mymulticolumn{1}{x{8.4cm}}{{\bf{show vxlan counters software}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}{\emph{See "Arista VXLAN Bridging" for more info.}}} \tn 
% Row Count 18 (+ 2)
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\mymulticolumn{1}{x{8.4cm}}{{\bf{show platform fap arp}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}{\emph{Confirm ARP in hardware.}}} \tn 
% Row Count 20 (+ 2)
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\mymulticolumn{1}{x{8.4cm}}{{\bf{show platform fap ip route}}} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}{\emph{Confirms the prefix points to an L3FloodFap0 interface used for recirculation.  These ports are 100G.}}} \tn 
% Row Count 24 (+ 4)
% Row 7
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\mymulticolumn{1}{x{8.4cm}}{VXLAN encapsulated protocol packets (BGP/ISIS/OSPF) use the CoppSystemL2Bcast queue.} \tn 
% Row Count 26 (+ 2)
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\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Configuration}}  \tn
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\mymulticolumn{1}{x{8.4cm}}{{\bf{VTEP1}} \newline {\emph{Configure a loopback as the L3 source interface for the VXLAN tunnel/VTEP.}} \newline {\bf{!}} \newline {\bf{interface loopback 1 }} \newline   {\bf{ip address 1.1.1.1/32}}  \newline {\emph{Configure a second IP, the virtual VTEP IP, on routing VTEPs.}} \newline   {\bf{ip address 100.100.100.100/32 secondary}} \newline {\bf{!}} \newline {\emph{Add DGs for routing - aka "anycast gateway"; can use VARP as seen here or "ip address virtual" to save IP space.}} \newline {\bf{!}} \newline {\bf{interface vlan 10}} \newline   {\bf{ip address 10.0.0.1/24}} \newline   {\bf{ip virtual-router address 10.0.0.254}} \newline {\bf{!}} \newline {\emph{Configure the VXLAN tunnel interface.}} \newline {\bf{!}} \newline {\bf{interface vxlan 1}} \newline {\emph{Add the source interface configured earlier.}} \newline   {\bf{vxlan source-interface loopback1}} \newline {\emph{Configure the UDP destination port; be consistent across VTEPs.}} \newline   {\bf{vxlan udp-port 4789}} \newline {\emph{Configure the VLAN to VNI bindings for any extended VLANs.}} \newline   {\bf{vxlan vlan 10 vni 10010}} \newline {\emph{Configure the static flood-set if using HER for control-plane; include all VTEP IPs that need to receive BUM traffic.}} \newline   {\bf{vxlan flood vtep 2.2.2.2 3.3.3.3}} \newline {\bf{!}} \newline {\emph{Configure the virtual MAC to be used with all virtual IPs.}} \newline {\bf{!}} \newline {\bf{ip virtual-router mac-address 00:00:11:22:33:44}} \newline {\bf{!}} \newline {\emph{Ensure routing is enabled.}} \newline {\bf{ip routing}} \newline {\bf{!}} \newline  \newline {\bf{VTEP2}} \newline {\bf{!}} \newline {\bf{interface loopback 1}}  \newline   {\bf{ip address 2.2.2.2/32}} \newline {\emph{Ensure the virtual VTEP IP is {\bf{identical}} across all routing VTEPs.}} \newline   {\bf{ip address 100.100.100.100/32 secondary}} \newline {\bf{!}} \newline {\bf{interface vlan 10}} \newline {\emph{Here using "ip address virtual" as the anycast gateway IP.}} \newline   {\bf{ip address virtual 10.0.0.254/24}} \newline {\bf{!}} \newline {\bf{interface vlan 20}} \newline   {\bf{ip address virtual 20.0.0.254/24}} \newline {\bf{!}} \newline {\bf{interface vxlan 1}} \newline   {\bf{vxlan source-interface loopback1}} \newline   {\bf{vxlan udp-port 4789}} \newline   {\bf{vxlan vlan 10 vni 10010}} \newline   {\bf{vxlan vlan 20 vni 10020}} \newline   {\bf{vxlan flood vtep 1.1.1.1 3.3.3.3}} \newline {\bf{!}} \newline {\bf{ip virtual-router mac-address 00:00:11:22:33:44}} \newline {\bf{!}} \newline {\bf{ip routing}} \newline {\bf{!}} \newline  \newline {\bf{VTEP 3}} \newline {\bf{!}} \newline {\bf{interface loopback 1}} \newline   {\bf{ip address 3.3.3.3/32 }} \newline   {\bf{ip address 100.100.100.100/32 secondary}} \newline {\bf{!}} \newline {\bf{interface vxlan 1}} \newline   {\bf{vxlan source-interface loopback1}} \newline   {\bf{vxlan udp-port 4789}} \newline   {\bf{vxlan vlan 30 vni 10030}} \newline   {\bf{vxlan flood vtep 1.1.1.1 2.2.2.2}} \newline {\bf{!}} \newline {\bf{ip routing}}} \tn 
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\mymulticolumn{1}{x{8.4cm}}{All routing VTEPs have secondary IPs, called Virtual VTEP IPs, configured that are identical. \newline  \newline In order to learn routes to remote destinations, routing protocols such as OSPF/BGP/ISIS can be configured in the overlay. \newline  \newline There is no "indirect" specific configuration necessary.}  \tn 
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% That's all folks
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