What is vrrp e

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Proven to meet the strict regulations of government, while supporting secure networks and protecting sensitive data. This guide describes the Virtual Router Redundancy Protocol VRRP feature provided by the switch, and how to configure the switch to participate in a virtual router.

On larger LANs, two or more switches may act as the gateway, and hosts use a dynamic routing protocol, such as RIP or OSPF, to determine the gateway switch to use as the next hop in order to reach a specific IP destination. However, there are a number of factors, such as administrative or processing overhead or even support for the protocols, which may make it undesirable to use a dynamic routing protocol.

One alternative is to use static routing; however, if the statically configured first hop switch fails, the hosts on the LAN are unable to communicate with those on the WAN. Displaying OSPFv2 results.

Changing default settings. Disabling and re-enabling OSPFv2 event logging. Understanding the effects of disabling OSPFv2. Disabling OSPFv2. OSPFv3 overview. Configuring the router ID.

Enabling OSPFv3. Configuring OSPFv3. OSPFv3 areas. Assigning OSPFv3 areas. Assigning OSPFv3 areas to interfaces. Configuring a stub area. Not-so-stubby area. Virtual link source address assignment. OSPFv3 route redistribution. Redistributing routes into OSPFv3. Configuring default external routes. Disabling and re-enabling OSPFv3 event logging. Filtering OSPFv3 routes. Configuring an OSPFv3 distribution list using a route map as input.

Modifying SPF timers. OSPFv3 administrative distance. Configuring administrative distance based on route type. Changing the reference bandwidth for the cost on OSPFv3 interfaces. Setting all OSPFv3 interfaces to the passive state. OSPFv3 graceful restart helper. Disabling OSPFv3 graceful restart helper. Re-enabling OSPFv3 graceful restart helper. OSPFv3 non-stop routing.

OSPFv3 Authentication. OSPFv3 authentication trailer. OSPFv3 keychain authentication. OSPFv3 authentication trailer configuration. Configuring keychain authentication on an OSPFv3 interface.

Configuring keychain authentication on an OSPFv3 virtual link. Configuring keychain authentication on an OSPFv3 area. Configuring authentication key activation wait time on an OSPFv3 interface.

Configuring authentication key activation wait time on an OSPFv3 virtual link. Displaying OSPFv3 results. Specifying the key rollover timer. Clearing IPsec statistics.

BGP4 overview. BGP4 peering. BGP4 message types. BGP4 attributes. BGP4 best path selection algorithm. Implementation of BGP4. Device ID. BGP global mode. Configuring a local AS number. Neighbor configuration. Configuring BGP4 neighbors. Peer groups. Configuring BGP4 peer groups. Advertising the default BGP4 route. Four-byte AS numbers.

Cooperative BGP4 route filtering. BGP4 parameters. Route redistribution. Redistributing routes into BGP4. Advertised networks. Importing routes into BGP4. Route reflection. Configuring a cluster ID for a route reflector.

Configuring a route reflector client. Route flap dampening. Aggregating routes advertised to BGP neighbors. Advertising the default BGP4 route to a specific neighbor. Multipath load sharing. Specifying the weight added to received routes. Adjusting defaults to improve routing performance. Next-hop recursion. Enabling next-hop recursion. Route filtering. BGP regular expression pattern-matching characters.

BGP4 outbound route filtering. Configuring BGP4 outbound route filtering. Enabling BGP4 cooperative route filtering.

BGP4 confederations. Configuring BGP4 confederations. BGP community and extended community. BGP4 graceful restart. Disabling BGP4 graceful restart. Re-enabling BGP4 graceful restart in bgp global configuration mode. Matching on a destination network. Matching on a next-hop device. Route-map continue statement for BGP4 routes.

Clearing diagnostic buffers. Displaying BGP4 statistics. Displaying BGP4 neighbor statistics. IPv6 unicast address family. Configuring a peer group with IPv4 and IPv6 peers. Enabling load-balancing across different paths. Route maps. Defining a community ACL. Applying a BGP extended community filter. Bidirectional Forwarding Detection Overview.

BFD Session States. BFD in a Stacking System. BFD Considerations and Limitations. LAG hashing on stacking products. Symmetric load balancing. Configuring a LAG. Configuring LAG virtual interface. Configuring an LACP timeout. Disabling ports within a LAG. Enabling ports within a LAG. Deleting a port from a currently operational LAG.

Assigning a name to a port within a LAG. Allowable characters for LAG names. Enabling sFlow forwarding on a port in a LAG. Setting the sFlow sampling rate for a LAG. IP assignment within a LAG. Renaming an existing LAG. Displaying LAG information. Enabling LAG hardware failover. Preboot eXecution Environment boot support. Enabling PXE boot support on a port. User-configured peer information per LACP. Resilient hashing. Resilient hashing limitations. Configuring resilient hashing.

Multi-Chassis Trunking. Multi-Chassis Trunking Overview. How MCT Works. MCT Terminology. MCT Data Flow. Basic MCT Configuration. MCT configuration considerations. Configuring MCT. Step 3: Configuring the Cluster. Step 4: Configuring Clients. Cluster Client Automatic Configuration.

MCT Failover Scenarios. Cluster Failover Mode. Client Isolation Mode. Shutting Down All Client Interfaces. Layer 2 Behavior with MCT. Dynamic Trunks. Port Loop Detection. MCT Layer 2 Protocols. Displaying information for multicast snooping. Multicast Snooping Configuration Example. Layer 3 Behavior with MCT. Layer 3 with MCT configuration considerations. Fast Convergence of Multicast Traffic. Requirements for Multicast MCT.

Displaying MCT information. MAC show and clear Commands. Client 1 Configuration. Client 2 Configuration. MVRP Overview. MVRP Limitations. Configuring MVRP. Spanning Tree Protocol. STP overview. Standard STP parameter configuration. STP parameters and defaults. Enabling or disabling STP globally. Enabling or disabling STP on an individual port.

Changing STP bridge and port parameters. Changing STP bridge parameters. Changing STP port parameters. STP protection enhancement. Enabling STP protection. Clearing BPDU drop counters. Displaying STP information.