CEF Output before FRR R6#sh ip cef 192.1.168.1.0/24nexthop 10.10.236.3 Ethernet0/1 Enabling FRR router eigrp Named address-family ipv4 unicast autonomous-system 100 topology basefast-reroute per-prefix all exit-af-topology exit-address-family CEF Output after enabling FRR R6#sh ip cef 192.1.168.1.0/24nexthop 10.10.236.3 Ethernet0/1repair: attached-nexthop 10.10.246.4 Ethernet1/2 For more information regarding this feature, please visit : ĮIGRP Route-tag Enhancement This feature enables us to specify and display route tags in dotted-decimal format, filter routes using the route tag value with wildcard mask same as ACL, and also set a default route tag for all Internal EIGRP routes. For more information regarding this feature, please visit : ĬE2-RR# router eigrp Named address-family ipv4 unicast autonomous-system 100 remote-neighbors source Ethernet0/0 unicast-listen lisp-encap Packet Flow Subnet 172.17.1.2/32 Next-hop 192.168.33.1 Subnet 172.17.1.2/32 Next-hop 192.168.33.1 LISP MPLS LISP CE1, CE3 # router eigrp Named address-family ipv4 unicast autonomous-system 100 neighbor 192.168.22.1 Ethernet0/0 remote 10 lisp-encapCĮIGRP Loop-Free Alternate: Fast Reroute The EIGRP Loop-Free Alternate Fast Reroute feature allows EIGRP to reduce the routing transition time to less than 50 ms by precomputing repair paths or backup routes and installing these paths or routes in the Forwarding Information Base (FIB). Uses EIGRP Route Reflectors (E-RRs) to form a half-mesh topology and ensure connectivity among all CEs in the network.Uses EIGRP on the control plane and Locator ID Separation Protocol (LISP) encapsulation on the data plane to route traffic across the underlying WAN architecture.Without creating any tunnel over the ISP cloud.Without advertising EIGRP routes to ISP network.Metric in combination with AD for summary-routes could be definedĮIGRP Classic Mode to Named Mode Conversion Just one command to migrate all your EIGRP configuration from Classic Mode to Named mode : eigrpupgrade-cli EIGRPNamed Usage : router eigrp eigrp upgrade-cli EIGRPNamed Please note : Interface level EIGRP commands won’t work after migrating to Named mode even if we try to configure them manually.ĮIGRP Classic Mode to Named Mode Conversion Example : router eigrp 100 eigrpupgrade-cli EIGRPNamedĮIGRP Add-path feature R1#sh ip route | sec 172.16.1.0 D 172.16.1.0 via 192.168.2.3, 00:13:37, Tunnel702 via 192.168.2.2, 00:13:37, Tunnel702 R4#sh ip route | sec 172.16.1.0 D 172.16.1.0 via 192.168.2.2, 00:00:30, Tunnel702 Configuring Add-path feature on Hub: R1(config)#router eigrp Named R1(config-router)#address-family ipv4 unicast autonomous-system 100 R1(config-router-af)#af-interface Tunnel702 R1(config-router-af-interface)#add-paths 2 R4#sh ip route | sec 172.16.1.0 D 172.16.1.0 via 192.168.2.3, 00:00:39, Tunnel702 via 192.168.2.2, 00:00:39, Tunnel702 Spoke2-R1 now learns the prefix from 2 routes !!! Most of the new features like Wide Metrics, EIGRP Route Tag Enhancements, Add Path Support, EIGRP Over the Top, EIGRP Loop-Free Alternate Fast Reroute, IPv6 VRF Lite are supported with Named Mode only. Unlike classic mode, the commands in Named mode are not scattered across interfaces and router mode. ![]() IETF Draft Link : Frequently Asked Questions : ĮIGRP Wide Metric Tengig1/1 Port-channel1 Tengig1/2 * Above metric values have been calculated using a constant Delay value of 100 usec When the wide metric routes are installed in Routing Table, metric is scaled by a constant value called “rib-scale factor = 128” #shipeigrptopo 10.0.0.0/8 EIGRP-IPv4 VR(Named) Topology Entry for AS(100)/ID(10.10.12.2) for 10.0.0.0/8 State is Passive, Query origin flag is 1, 1 Successor(s), FD is 6619136, RIB is 51712 Descriptor Blocks: 10.10.12.1 (Port-channel1), from 10.10.12.1, Send flag is 0x0 Composite metric is (6619136/6586368), route is Internal #ship route 10.0.0.0 255.0.0.0 Routing entry for 10.0.0.0/8 Known via "eigrp 100", distance 90, metric 51712, type internalĮIGRP Named Mode Classic mode: Configuring “router eigrp” command with a numberNamed mode: Configuring “router eigrp” command with the virtual-instance-name With Named Mode the commands are configured in hierarchical manner under the router-config mode. EIGRP Loop-Free Alternate - Fast Reroute ĮIGRP IETF Draft Open since 18th Feb.Enhancements in EIGRP Pawan Gupta Rahul Kukreja
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