I put an IP address and subnet mask on the mgmt0 port and connected a copper cable to it and on the other end its connected to a switchport on another switch in the management vlan. vPC Keep-alive parameters A vPC can provide Layer 2 multipathing, which allows you to . Nexus "ah-ha" moment part 1. Configure Spanning-tree. When implementing Virtual port-channel (vPC), a best practice is to use the MGMT0 interface for the VPC keepalive link. A virtual PortChannel (vPC) allows links that are physically connected to two different Cisco Nexus devices to appear as a single Port Channel to a third device. ASA has an L3 /30 link to each 9k. The IPL IP address must not overlap with any other address on the switch. LAB-MEL-SVRSW-P1-2# sh ip int br IP . Next thing - there should be no green light if the link is down - I would check this cable does not go to some active equipment/patch panel etc. 3. I have been using the Nexus platform for a year now. I found this early on to be painful thinking "Where are my FEX's". In Exadata X7 configuration the Cisco switch should be monitored using Infiniband monitoring as the Management port (which is a secondary network) is not connected. If you attempt to configure switch-profile peer with any non-mgmt0 IP, the switch will show 'Peer not Reachable', even though the IP is pingable . Those include:static routes, switch virtual interfaces (SVIs), Hot Standby Router Protocol (HSRP), and Routing Information Protocol (RIP) by . I always find I get "ah-ha" moments due to the fact most of the time I am hiding in IOS. switch# show cdp global Global CDP information: CDP enabled globally Refresh time is 60 seconds Hold time is 180 seconds CDPv2 advertisements is enabled DeviceID TLV in System-Name (Default) Format switch# show cdp interface To display the Cisco Discovery Protocol (CDP) parameters for an interface, use the show cdp interface command. multiple relationships in forensic psychology; mama gen protogen The interface config is bare bones at this point: interface fex100/1/1 switchport access vlan xx spanning-tree port type edge no shut I have tried to plug other devices into the port and no link lights will come up. This is the config of that port: They serve as a conduit between switches for frames destined to remote N ports and NL ports. -Sent on interface : mgmt0 -Receive status : Success -Last receive at : 2014.08.21 10:52:29 925 ms -Received on interface : mgmt0 -Last update from peer : (0) seconds, (485) msec. 2. This port may be connected to another E port to create an Inter-Switch Link (ISL) between two switches. 'show interface mgmt0' on the N5K does show that the interface is in 'down' state. Eth1/9 1 eth access down Link not connected 10G(D) . The topology for this lab is detailed here (open in another tab for reference): I'll be following these steps to configure vPC : 1. This state could be caused by a flapping port which could indicate a problem with the media. You can use the management Ethernet interface to connect the device to a network for remote management using a Telnet client, the Simple Network Management Protocol (SNMP), or other management agents. 1. In case a switch is not available to connect management ports, back to back connection is acceptable. 'show interface mgmt0' on the N5K does show that the interface is in 'down' state. After opening a TAC case and collecting debugs over and over again, . mgmt0 is down (Link not connected) admin state is up, Ethernet1/1 is down (Link not connected) Dedicated Interface Belongs to Po101 Hardware: 1000/10000 Ethernet, address: 002a.6a10.7388 (bia 002a.6a10.7388) MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA Port mode is fex-fabric auto-duplex, 10 Gb/s, media type is 10G Beacon is . If you cannot use mgmt0 for vPC keepalive, you probably cannot use it for config-sync neither. You need to verify the physical connectivity and unshut the port: switch1# config t switch1 (config)# int mgmt 0 switch1 (config-if)# no shut The Nexus switches provide Layer 2 features without the Essentials licenses. Symptom: When we issue 'shutdown' to 'interface mgmt 0' on the N5K, the link never goes down. The remote end still shows link UP. nymn 7tv. 03-22-2013 05:26 AM Mgmt 0 Interface Down - HA not ready Setting up a new set of 6248 FIs running 2.1 (a) - HA never becomes ready - After some investigation within NXOS mgmt 0 reports as down "link not connected", even though I am connected on that interface to both FIs and the cluster IP - I have changed cabled and switch etc. nx-osv mgmt0 link not connected nx-osv-2 (config-if)# do show int mgmt 0 mgmt0 is down (Link not connected) admin state is up It looks fine in uwm Ports of network flat Delete selected Name Status Fixed IP Address Options </guest/endpoint>-<nxos_test-olzJK3>-<nx-osv-1>-<flat> ACTIVE 172.16.15.101 N5K-2(config)# sho int mgmt0 mgmt0 is down (Link not connected) Hardware: GigabitEthernet, address: 0005.9b7a.8800 (bia 0005.9b7a.8800) There it is, but why is it being learned? The remote end still shows link UP. Nexus 's and ASA all participate in EIGRP and form neighborships successfully. To confirm that the Management Port is not connected, the following command can be run: my01sw-ip> show interface mgmt0. Who initiated the link flap. Verifying the ErrDisable State Using the CLI No need for cross-connect cable. Sep 26. Enable LACP feature. On my Cisco Catalyst 3850 there is a SFP Module which is connected to another device, the port on the Other device (vendor equipment) come up but my interface is still down. Right click on the NX-OS device thats currently showing up as "Unreachable" and console into it. 1 cisco_disco18 3 yr. ago IP address of MLAG-VIP must be in same subnet as the MGMT ports MGMT0 must be used for MLAG. The management port (mgmt0) is autosensing and operates in full-duplex mode at a speed of 10/100/1000 Mb/s. walmart receipt template pdf. - once topology is started up, mgmt0 interface links (and therefore protocols) are down on all devices (NX-OS devices: N7K, N9K), it takes corresponding interface shut / no shut to bring it to up/up state. Take a Nexus 7K for example: two supervisors, two mgmt0, one is active. This makes devices reachable from LXC and VIRL hosts but not on flat network; A Port Is in the ErrDisabled State The ErrDisabled state indicates that the switch detected a problem with the port and disabled the port. 9k: interface mgmt0 vrf member management ip address 10.111.1.2/24 The switch CPU types must match (x86 or PPC). E ports carry frames between switches for configuration and fabric management. The keep-alive link (s) can be connected via links (at least 1Gbps) on a dedicated VRF, via mgmt0, or via an L3 routed network - in order of preference. After the Engineer pointed out the issue, shutting down the ports connected to the 3750 instantly resolved the connectivity issues - looks like I need to revisit my spanning-tree and port-channel . There are a few other fexs connected as well. According to Cisco documentation, config-sync traffic is carried over mgmt0 interface (see balow). E ports support class 2, class 3, and class F service. I'm assuming you have already read the configuration guides and have a general understanding of vPC . Here is a little one regarding showing interfaces. mgmt0 -- down 172.16.118.62 -- 1500 If the status shows that it is down, it means there is no physical connection to mgmt0 or that the interface is in admin shutdown. N5K-2(config)# sho int mgmt0 mgmt0 is down (Link not connected) Hardware: GigabitEthernet, address: 0005.9b7a.8800 (bia 0005.9b7a.8800) . The DOM Information show me receive and transmit pegel and if I do a shut command on that interface the other side goes down. MGMT0 enables you to manage the devices by the IPv4 or IPv6 address on the MGMT0 interface; the mgmt0 interface is a 10/100/1000 Ethernet interface. The fex is set up properly and is communicating to the Nexus 5548 without issue. The third device can be a Cisco Nexus 2000 Series Fabric Extender or a switch, server, or any other networking device. Switch# show interface mgmt 0 mgmt0 is up Hardware is GigabitEthernet Address is 001d.a20f.a998 Internet address is 10.32.167.226/24 - IPv4 address of management interface MTU 1500 bytes, BW 100 Mbps full Duplex 14702321 packets input, 1271551817 bytes 28651 multicast frames, 0 compressed 0 input errors, 0 frame 0 overrun, 0 fifo The interface is down (and the MAC still remained even when Admin Down). Once you're in just change the port speed on the mgmt0 to 100Mb instead of the default 1000Mb, give it a few seconds and you should get a message in VM Maestro Console window that it went from Unreachable to reachable. 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