• Author : Roland Phung


VRRP IPv6 using VRRP IPv4 MAC prefix

This document describes how to use the new feature, VRRP IPv6 using VRRP IPv4 MAC prefixes. RFC 5798 defines a specific mapping of VRRP Virtual Router Identifier (VRID) to a MAC prefix. For example, a VRRP IPv6 instance would use 00:00:5e:00:02:<VRID> as the virtual MAC address. The new feature would allow to over ride the RFC specification and use VRRP IPv4 virtual MAC address 00:00:5e:00:01:<VRID> prefix for IPv6 VRRP configurations. For example, an IPv6 VRRP group with VRID 10 would have a mac address 00:00:5e:00:02:0a. When the feature is configured via “vrrp ipv6 mac range ipv4“, 00:00:5e:00:01:0a will be used...
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IPv4 VRRP VRF support

As of EOS 4.15.0F, VRRP is supported in a VRF context. Virtual IP addresses can be reused in different VRF contexts, but still follow the same rules within the each VRF. Configuration To enable VRRP in a VRF, the user must do the following steps: Configure VRF: Switch(config)#vrf definition foobar Switch(config-vrf-foobar)#rd 100:10 Enable global and VRF routing: Switch(config)#ip routing Switch(config)#ip routing vrf foobar Add a Vlan into the VRF and add a physical IP address: Switch(config)#interface Vlan10 Switch(config-if-Vl10)#vrf forwarding foobar Switch(config-if-Vl10)#ip address Finally, configure VRRP normally: Switch(config-if-Vl10)#vrrp 1 ip Switch(config-if-Vl10)#vrrp 1 ?                  ...
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IPv6 VRF management features

EOS-4.15.0F is introducing support of IPv6 management capabilities inside a VRF. This means existing management capabilities available in the default VRF, are now available in any VRF defined by user through IPv6. You can find below description and example for this new feature. SSH/Telnet (Secure shell) In an interface with a VRF context and an IPv6 address configured, it supports ssh/telnet related features. Tacacs+ (Terminal Access Controller Access Control System) With a VRF configured, an IPv6 host can be specified as the Tacacs+ server as well as the source interface of an interface configured with a VRF and IPv6 address. SNMP (Simple Network Messaging...
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Source ARP with virtual IP

Source ARP with a virtual IP is a new VARP feature. The purpose of this feature is to change the ARP request header’s source IP and source MAC address to the virtual IP and virtual MAC addresses.  This change occurs for all the ARP request packets originating from the router that match a configured virtual subnet. The VARP MAC address is used as the source MAC address, while the virtual IP address is based on the interface on which the packet goes out. This feature is also supported in a VRF context. Following is the example configuration: ip virtual-router mac-address 0011.2233.4455 ip...
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