Configuring minimum and reload initialization delay. In my experience, it makes it easier to troubleshoot as you know immediately which redundancy protocol youre dealing with hsrp, glbp, or vrrp. Configuring cisco nexus 7000 switches dcnx7k training. Nxos is the operating system used in nexus devices.
Virtual device contexts vdcs in the nexus 7000 switches. Supported numbers of vlansvpcs are not related to an hardware or software limit but reflect what has been currently validated by our qa. Cisco nxos hsrp cisco ios software hsrp command description. If you are running vpc between your nexus 7000 pair it is recommended that you run hsrp if you are going to use a fhrp. Only one of these routers will be active at a particular time with a virtual ip address of 192. One of the most basic cisco dcloud lab to get you a handson experience on basic nxos running on 7k platforms. Im an admin that is used to working with older cisco gear, the catalyst 6500 and the like. Cisco nexus 7000 member ports participating in a single vpc should be configured consistently as it would be done for any standard portchannel members. Troubleshooting hsrp on cisco nexus 5500 switches netcraftsmen. There are three fhrp protocols available which we will be discussing here. This seemed like it was possibly the same issue with the nexus 5500s. In computer networking, the hot standby router protocol hsrp is a cisco proprietary redundancy protocol for establishing a faulttolerant default gateway.
Cisco nxos software contains a vulnerability that could allow an unauthenticated, adjacent attacker to cause a denial of service condition. These packets are sent to the destination ip multicast. The cisco nexus 7000 series also support python v2. The standby hsrpvrrp vpc peer device just relays the arp request. Cisco licensing, cisco nexus 5500, cisco nexus 5500 license, cisco nexus 5500 licensing, cisco nexus 5600, cisco nxos, featurebased licenses, featurebased licenses for the cisco nexus 5000, n5548el1ssk9. The following list of features are included in the nxosv image. Hsrp vmac is not programmed with the g flag in the software mac table on vpc peer. The vpc peers must run the same nxos version except during the nondisruptive upgrade, that is, inservice software upgrade issu. As with almost any other protocol on the nexus, these will be need to be enabled via the. It expands the group number range from 0 to 4095 and consequently uses a new mac address range 0000. Cisco implements a proprietary version of fhrp gateway load balancing protocol.
In the resilient campus design session, the presenter discussed factors and configurations that make a network more resilient. The mapserver configuration is documented for reference and completeness. When i change the priority of a vlan to 200 to 50 for example, nexus 2 become active and nexus 1 standby. In addition, consistency should be made sure of in the configuration of spanning tree protocol, hot standby router protocol hsrp, and protocol independent multicast pim. Is it possible to make a truly active\active l3 vrrp\hsrp. Candidates may see more recent nxos versions installed in the lab, but they will not be tested on features on newer software releases that are not explicitly listed below. Cisco catalyst 6500 vss and cisco nexus 7000 vpc it tips. This change ensures stability of the hsrp groups in all cases. It is very different from ios however, once you start using it, you will notice that it is very easy to operate. Cisco nxos software hsrp authentication denial of service. Nexus 5000 16port portchannel support introduced in 4. It consists of just two routers r1 and r2 acting as the default gateway for the 192.
Hsrp version 2 has a different packet format than hsrp version 1. On a cisco nexus switch, the syntax for hsrp is actually hsrp instead of standby. Featurebased licenses for the cisco nexus 5000, nexus. See the cisco nexus 7000 series nxos layer 2 switching configuration guide, release 5. A device with ios xe software is used for the role of mapserver, and not a cisco nexus 7000 series device.
The cisco nexus 5000 series switches with releases 5. Not everyone knows that hsrp, a faulttolerant default gateway protocol, has two versions. Basic initial configuration of interfaces, session control, hsrp and ospf configuration. The hot standby router protocol hsrp is one of the first hop redundancy protocols fhrp designed to allow for transparent failover of the gateway. The second version was integrated from ios release 12. Cisco nexus 9000 series troubleshooting manual pdf. It is not possible to configure vpc on a pair of switches consisting of a nexus 7000 series and a nexus 5000 series switch. Hsrp hot standby routing protocol first off, hsrp is ciscos proprietary redundancy protocol that allows a standby router to take over active control of the packet forwarding process in the event of a failure. Hsrp hot standby router protocol linkedin slideshare. Troubleshooting cisco nexus switches and nxos cisco press. I know some discussion for fabric path and its layer 3 forwarding limitations, so it is important to have this feature if you decided to implement leaf and spine architecture and cisco as a vendor.
Install and configure vmware nsx network virtualization software done one time. Cisco ios nexus 7000 nxos hsrp cisco ios cli cisco nxos cli. Heres technical guidance on troubleshooting an hsrp issue with two nexus. Use the hardware forwarding dynamicallocation enable command to reallocate unused blocks in the fib use the hardware forwarding dynamicallocation disable command to disable the dynamic tcam allocation.
Cisco fhrp on nexus fhrp cisco nexus hsrp concepts. Packets received on a layer 2 vlan interface destined for the hsrp virtual ip address terminate on the active router. Nexus 7000 hsrp active standby issue cisco community. The packet format uses a typelengthvalue tlv format. Cisco nexus 7000 switches do not support dynamic ip routing with peers on vpc vlans. This image is not for use in a production environment and is considered to be a simulator for the nexus 7000 series and is not an emulator as the software dataplane does not emulate the nexus 7000 series forwarding hardware. Pc1 will be configured with this virtual ip address. This new support will allow vpc traffic through both the active and standby hsrp router. Cisco nexus 9000 series nxos troubleshooting guide, release 7.
Cscuq88032 hsrp standby in vpc will not program g flag if priority is 0. Dualactive exclude interfacevlan is configured for the svi. Hsrp interoperates with virtual port channels vpcs. Dear all i had config hsrp on 2 switches cisco nexus 7000 non vpc. Since cisco introduced the cuttingedge nexus 7000 line in 2008, network engineers have constantly debated over the nexus versus the catalyst. Im trying to create a truly active\active configuration with hsrp \vrrp at l3. Cisco nexus 7000 and nexus 7700 line cards filed in. In addition, consistency should be made sure of in the configuration of spanning tree protocol, hot standby router protocol hsrp, and protocol. Download the sample pages includes chapter 8 and index table of contents. Hsrp is often used in campus networks as a first hop redundancy protocol. A vpc domain without an active hsrp instance in a group would not able to forward traffic. A host may not be able to resolve arp for their hsrp gw if it is singlehomed to a vpc secondary device with dualactive exclude interfacevlan configured for the svi that hosts the hsrp vip. Nexus 7000 series switches using hsrp configuration example. The control plane refers to traffic that is sent to the nexus switch.
Hsrp hot standby router protocol hot standby router protocol hsrp is a cisco proprietary redundancy protocol for establishing a fault tolerant default gateway, and has been described in detail in rfc 2281. Describe software architecture, configure and troubleshoot cisco nexus 7000. Hsrp version 2 now advertises and learns millisecond timer values, improving the stability of hsrp. Hsrp routers communicate with each other by exchanging hsrp hello packets. Hot standby router protocol hsrp virtual router redundancy protocol vrrp gateway load balancing protocols. Fhrp is the first hop redundancy protocols which provides 247365 days active gateways to all hosts configured in dc.
Hsrp hot standby routing protocol in packet tracer 6. This is my first time diving into the world of nxos. Hsrp version 2 packets received by an hsrp version 1 router are ignored. Use the show vrf interface command to determine the interface to which the vlan interface is assigned. The data plane refers to traffic that the nexus switch forwards. In control plane terms, hsrp with vpc is activepassive. So recently i was involved in a project to swap out a nexus core that consisted of nexus 7k chassis with nexus 5k distribution switches in favor of new nexus 9396 models. How the cisco nxos is used for functionality specific to different cisco nexus switching platforms, such as the 9000, 7000, 5000, 2000, and series switches basic and advanced configurations of the cisco nexus 9000, 7000, 5000, 2000, and series switches using the. The configuring cisco nexus 7000 switches dcnx7k v3. Version 1 of the protocol was described in rfc 2281 in 1998. Ieft version of this protocol is virtual router redundancy protocol vrrp. Nexus advocates favor the newer lines speed and virtualization capabilities. Cisco nexus 7000 series nxos unicast routing configuration guide.
The protocol establishes an association between gateways in order to achieve default gateway failover if the. Those who oversee catalyst 6500powered networks are happy with and accustomed to the widely used, lowercost catalyst switches. A standalone copy or paraphrase of the text of this document that omits the distribution url is an uncontrolled copy and may lack important information or contain factual. Cisco nexus products nexus 7000 and 7700 features at a high level nexus 9000 features at a high level the nxos software architecture cisco nxos architecture, key features, and capabilities. The total number of hsrp group numbers increases from 256 to 4096 not necessarily to utilize this many groups on a single interface, but to match local vlan numberson subinterfacesfor easy troubleshooting and documentation. See this cisco doc for more information on hsrp on the nexus 7000 platform. This is because only the primary switch responds to arp requests. I configure hsrp traditionnaly, nexus 1 with a priority of 200 and nexus 2 with a priority of 100 for all vlan.
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