Pvlan Operations When One Vlt Peer Is Down; Pvlan Operations When A Vlt Peer Is Restarted; Interoperation Of Vlt Nodes In A Pvlan With Arp Requests - Dell C9000 Series Networking Configuration Manual

mode on both the peers is identical. For example, if the MAC address is learned on a VLT LAG and the VLAN is
a primary VLT VLAN on one peer and not a primary VLT VLAN on the other peer, MAC synchronization does
not occur.
Whenever a change occurs in the VLAN mode of one of the peers, this modification is synchronized with the
other peers. Depending on the validation mechanism that is initiated for MAC synchronization of VLT peers,
MAC addresses learned on a particular VLAN are either synchronized with the other peers, or MAC addresses
synchronized from the other peers on the same VLAN are deleted. This method of processing occurs when
the PVLAN mode of VLT LAGs is modified.
Because the VLTi link is only a member of symmetric VLT PVLANs, MAC synchronization takes place directly
based on the membership of the VLTi link in a VLAN and the VLT LAG mode.

PVLAN Operations When One VLT Peer is Down

When a VLT port moves to the Admin or Operationally Down state on only one of the VLT nodes, the VLT Lag
is still considered to be up. All the PVLAN MAC entries that correspond to the operationally down VLT LAG are
maintained as synchronized entries in the device. These MAC entries are removed when the peer VLT LAG
also becomes inactive or a change in PVLAN configuration occurs.
PVLAN Operations When a VLT Peer is
Restarted
When the VLT peer node is rebooted, the VLAN membership of the VLTi link is preserved and when the peer
node comes back online, a verification is performed with the newly received PVLAN configuration from the
peer. If any differences are identified, the VLTi link is either added or removed from the VLAN. When the peer
node restarts and returns online, all the PVLAN configurations are exchanged across the peers. Based on the
information received from the peer, a bulk synchronization of MAC addresses that belong to spanned PVLANs
is performed.
During the booting phase or when the ICL link attempts to come up, a system logging message is recorded if
VLT PVLAN mismatches, PVLAN mode mismatches, PVLAN association mismatches, or PVLAN port mode
mismatches occur. Also, you can view these discrepancies if any occur by using the show vlt mismatch
command.
Interoperation of VLT Nodes in a PVLAN with
ARP Requests
When an ARP request is received, and the following conditions are applicable, the IP stack performs certain
operations.
• The VLAN on which the ARP request is received is a secondary VLAN (community or isolated VLAN).
• Layer 3 communication between secondary VLANs in a private VLAN is enabled by using the ip local-
proxy-arp command in INTERFACE VLAN configuration mode.
Virtual Link Trunking (VLT) 1206