Conditions: Not able to see the issue in the latest version. Show logging serve shows vrf Management in use. We do not sell software.Symptom: Nexus 3000 does not send syslog messages to logging server if configure to use default VRF. Will show signs of use and minor cosmetic blemishes. 1 Year Parts Replacement Warranty. Send document comments to nexus3k-docfeedbackcisco.com Contents v Cisco Nexus 3000 Series Hardware Installation Guide Installing the Switch 2-5 Grounding the Switch 2-10 Proper Grounding Practices 2-11 Establishing the System Ground 2-12 Required Tools and Equipment 2-13 Grounding the Cisco Nexus 3000 Series Chassis 2-13This chapter describes how to configure the Hot Standby Router Protocol (HSRP) on the Cisco NX-OS switch.Seller Notes: Refurbished and Tested.
Cisco Nexus 3000 Series Of FabricYou use HSRP in a group of routers for selecting an active router and a standby router. HSRP provides first-hop routing redundancy for IP hosts on Ethernet networks configured with a default router IP address. Feature History for HSRP Information About HSRPCisco Nexus 3000 NX-OS Configuring VLAN and VTP A VLAN is a group of end stations in a switched network that is logically segmented by function or application, without regard to the physical locations of the users.HSRP is a first-hop redundancy protocol (FHRP) that allows a transparent failover of the first-hop IP router. Made up of the Nexus 3000, high-density Nexus 3100, and the ultra-low-latency Nexus 3500, the Cisco Nexus 3000 series. Extending Cisco Unified Fabric to the data center, the Cisco Nexus 3000 series of fabric extenders provides 1/10 Gigabit Ethernet (GE) wire-speed Layer 2 and 3 switching for data center top-of-rack deployments. Cisco Nexus CLI commands, Cisco Nexus 9000 commands, nexus 7000 5000 3000.This chapter includes the following sections:Nexus 3000.Cisco Nexus 3000 How To Configure TheHSRP selects one of these interfaces to be the active router. You also configure a unique IP address and MAC address on each interface that acts as the real address. You configure the same virtual address on each HSRP-enabled interface in the group. The virtual IP address is an IPv4 or IPv6 address that is shared among a group of routers that run HSRP.When you configure HSRP on a network segment, you provide a virtual MAC address and a virtual IP address for the HSRP group. HSRP provides failover services to these hosts.This section includes the following topics:When you use HSRP, you configure the HSRP virtual IP address as the host's default router (instead of the IP address of the actual router). Running a dynamic router discovery mechanism on every host is not feasible for a number of reasons, including administrative overhead, processing overhead, and security issues. When the active router fails to send a hello message within a configurable period of time, the standby router with the highest priority becomes the active router. The default priority is 100, so if you configure just one interface with a higher priority, that interface becomes the default active router.Interfaces that run HSRP send and receive multicast User Datagram Protocol (UDP)-based hello messages to detect a failure and to designate active and standby routers. To configure an interface as the active router, you assign it with a priority that is higher than the priority of all the other HSRP-configured interfaces in the group. HSRP also selects a new standby router at that time.HSRP uses a priority mechanism to determine which HSRP-configured interface becomes the default active router. At that point, a selected standby router assumes control of the virtual MAC and IP addresses of the HSRP group. Adobe acrobat premium apkInstead, you configure them with the IP address (virtual IP address) of the virtual router as their default router. You do not need to configure the hosts on the LAN with the IP address of the active router. By sharing a virtual MAC address and a virtual IP address, two or more interfaces can act as a single virtual router.Figure 17-1 HSRP Topology with Two Enabled RoutersThe virtual router does not physically exist but represents the common default router for interfaces that are configured to provide backup to each other. Night at the smithsonianThe BIA is the last six bytes of the MAC address that is assigned by the manufacturer of the network interface card (NIC).Because hosts are configured with their default router as the HSRP virtual IP address, hosts must communicate with the MAC address associated with the HSRP virtual IP address. The active router sources hello packets from its configured IP address and the HSRP virtual MAC address while the standby router sources hellos from its configured IP address and the interface MAC address, which may or may not be the burned-in address (BIA). These packets are sent to the destination IP multicast address 224.0.0.2 (reserved multicast address used to communicate to all routers) on UDP port 1985. Packets received on a Layer 2 (VLAN) interface destined for the HSRP virtual IP address will terminate on the active router.HSRP routers communicate with each other by exchanging HSRP hello packets. This includes ping and Telnet traffic. From the host perspective, the virtual router remains the same.Note Packets received on a routed port destined for the HSRP virtual IP address will terminate on the local router, regardless of whether that router is the active HSRP router or the standby HSRP router. Virtual MAC address range from 0005.73A0.0000 through 0005.73A0.0FFF HSRP uses the virtual MAC address for active HSRP group messages only (hello, coup, and redesign).HSRP for IPv6 uses the following parameters: These RAs stop after a final RA is sent with a router lifetime of 0 when the HSRP group leaves the active state. Other protocols continue to receive and send packets to this address.IPv6 ND sends periodic RAs for the HSRP virtual IPv6 link-local address when the HSRP group is active. No restrictions occur for the interface IPv6 link-local address. HSRP for IPv6 provides a virtual first hop for IPv6 hosts.When you configure an IPv6 interface for HSRP, the periodic RAs for the interface link-local address stop after IPv6 ND sends a final RA with a router lifetime of zero. You can configure an interface to use HSRP version 2.HSRP version 2 has the following enhancements to HSRP version 1: HSRP VersionsCisco NX-OS supports HSRP version 1 by default. ICMPv6 redirects are not supported for HSRP IPv6 groups. There are also no secondary virtual IP addresses for link-local addresses.For global unicast addresses, HSRP will add the virtual IPv6 address to the URIB and IPv6 but will not register the virtual IPv6 addresses to ICMPv6. The default virtual MAC address for an HSRP IPv6 group will always be used to form the virtual Ipv6 link-local address, regardless of the actual virtual MAC address used by the group.Table 17-1 shows the MAC and IP addresses used for IPv6 neighbor discovery packets and HSRP packets.HSRP does not add IPv6 link-local addresses to the Unicast Routing Information Base (URIB). Hop limit set to 255 HSRP IPv6 AddressesAn HSRP IPv6 group has a virtual MAC address that is derived from the HSRP group number and a virtual IPv6 link-local address that is derived, by default, from the HSRP virtual MAC address. HSRP version 1 uses the MAC address range 0000.0C07.AC00 to 0000.0C07.ACFF. Uses the MAC address range from 0000.0C9F.F000 to 0000.0C9F.FFFF for IPv.73A0.0000 through 0005.73A0.0FFF for IPv6 addresses. For IPv4, uses the IPv4 multicast address 224.0.0.102 or the IPv6 multicast address FF02::66 to send hello packets instead of the multicast address of 224.0.0.2, which is used by HSRP version 1. HSRP version 2 supports group numbers from 0 to 4095. HSRP version 1 supports group numbers from 0 to 255.
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