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Nexus Switching 2nd Edition

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10 permit 0000.0c07.ac00 0000.0000.00ff any<br />

20 permit 0000.0c9f.f000 0000.0000.0fff any<br />

!<br />

vlan access-map HSRP_Localization 10<br />

match mac address HSRP_VMAC<br />

match ip address HSRP_IP<br />

action drop<br />

!<br />

vlan access-map HSRP_Localization 20<br />

match mac address ALL_MACs<br />

match ip address ALL_IPs<br />

action forward<br />

!<br />

vlan filter HSRP_Local vlan-list 10,11,600, 601, 700, 701<br />

mac-list HSRP_VMAC_Deny seq 5 deny 0000.0c07.ac00<br />

ffff.ffff.ff00<br />

mac-list HSRP_VMAC_Deny seq 10 deny 0000.0c9f.f000<br />

0000.0000.0fff<br />

mac-list HSRP_VMAC_Deny seq 15 permit 0000.0000.0000<br />

0000.0000.0000<br />

!<br />

route-map stop-HSRP permit 10<br />

match mac-list HSRP_VMAC_Deny<br />

!<br />

otv-isis default<br />

vpn Overlay0<br />

redistribute filter route-map stop-HSRP<br />

Inbound Path Optimization<br />

Inbound path optimization is equally important to optimizing outbound routing in an OTV<br />

environment to provide proper flow symmetry. An additional level of intelligence is<br />

required to provide information on which specific location an IP address is available <strong>and</strong><br />

avoid a suboptimal traffic path acr<strong>os</strong>s the L2 connection established between OTV sites.<br />

Server virtualization <strong>and</strong> high availability acr<strong>os</strong>s geographically dispersed data centers are<br />

common in data center deployments today. Workload virtualization requires location<br />

independence for server resources <strong>and</strong> requires the flexibility to move these server<br />

resources from one data center to another to meet increasing workloads <strong>and</strong> to support<br />

disaster recovery. This brings the challenge of route optimization when the virtual servers<br />

move to route traffic to its current location. It also keeps the server’s identity (IP address)<br />

the same acr<strong>os</strong>s moves, so the clients can continue to send traffic regardless of the server’s<br />

current location.<br />

Several methods exist to control <strong>and</strong> manage inbound routing, including Route Health<br />

Injection (RHI), Null Aggregation, <strong>and</strong> Locator Identity Separation Protocol (LISP). These

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