Passer au contenu principal
Quitter

Bienvenue dans l’univers Dell

Mon compte
  • Passer des commandes rapidement et facilement
  • Afficher les commandes et suivre l’état de votre expédition
  • Créez et accédez à une liste de vos produits
  • Gérer vos sites, vos produits et vos contacts au niveau des produits Dell EMC à l’aide de la rubrique Gestion des informations de l’entreprise.
Se connecter Créer un compte Connexion au compte Premier Connexion au programme de partenariat
Nous contacter

Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

PDF

Important Points to Remember

  • VLT port channel interfaces must be switch ports.
  • If you include RSTP on the system, configure it before VLT. Refer to RSTP Configuration.
  • Ensure that the spanning tree root bridge is at the Aggregation layer. If you enable RSTP on the VLT device, refer to RSTP and VLT for guidelines to avoid traffic loss.
  • If you reboot both VLT peers in BMP mode and the VLT LAGs are static, the DHCP server reply to the DHCP discover offer may not be forwarded by the ToR to the correct node. To avoid this scenario, configure the VLT LAGs to the ToR and the ToR port channel to the VLT peers with LACP. If supported by the ToR, enable the lacp-ungroup feature on the ToR using the lacp ungroup member-independent port-channel command.
  • If the lacp-ungroup feature is not supported on the ToR, reboot the VLT peers one at a time. After rebooting, verify that VLTi (ICL) is active before attempting DHCP connectivity.
  • When you enable IGMP snooping on the VLT peers, ensure the value of the delay-restore command is not less than the query interval.
  • When you enable Layer 3 routing protocols on VLT peers, make sure the delay-restore timer is set to a value that allows sufficient time for all routes to establish adjacency and exchange all the L3 routes between the VLT peers before you enable the VLT ports.
  • Only use the lacp ungroup member-independent command if the system connects to nodes using bare metal provisioning (BMP) to upgrade or boot from the network.
  • Ensure that you configure all port channels where LACP ungroup is applicable as hybrid ports and as untagged members of a VLAN. BMP uses untagged dynamic host configuration protocol (DHCP) packets to communicate with the DHCP server.
  • If the DHCP server is located on the ToR and the VLTi (ICL) is down due to a failed link when a VLT node is rebooted in BMP mode, it is not able to reach the DHCP server, resulting in BMP failure.
  • If the source is connected to an orphan (non-spanned, non-VLT) port in a VLT peer, the receiver is connected to a VLT (spanned) port-channel, and the VLT port-channel link between the VLT peer connected to the source and TOR is down, traffic is duplicated due to route inconsistency between peers. To avoid this scenario, Dell Networking recommends configuring both the source and the receiver on a spanned VLT VLAN.
  • In a topology in which two VLT peer nodes that are connected by a VLTi link and are connected to a ToR switch using a VLT LAG interface, if you configure an egress IP ACL and apply it on the VLT LAG of both peers using the deny ip any any command, the traffic is permitted on the VLT LAG instead of being denied. The correct behavior of dropping the traffic on the VLT LAG occurs when VLT is up on both the peer nodes. However, if VLT goes down on one of the peers, traffic traverses through VLTi and the other peer switches it to the VLT LAG. Although egress ACL is applied on the VLT nodes to deny all traffic, this egress ACL does not deny the traffic (switching traffic is not denied owing to the egress IP ACL). You cannot use egress ACLs to deny traffic properly in such a VLT scenario.

  • To support Q-in-Q over VLT, ICL is implicitly made as vlan-stack trunk port and the TPID of the ICL is set as 8100.

  • Layer 2 Protocol Tunneling is not supported in VLT.

Évaluez ce contenu

Précis
Utile
Facile à comprendre
Avez-vous trouvé cet article utile ?
0/3000 characters
  Veuillez attribuer une note (1 à 5 étoiles).
  Veuillez attribuer une note (1 à 5 étoiles).
  Veuillez attribuer une note (1 à 5 étoiles).
  Veuillez indiquer si l’article a été utile ou non.
  Les commentaires ne doivent pas contenir les caractères spéciaux : <>()\