Peer Routing Configuration Example - Dell S4048–ON Configuration Manual

Configure both ends of the VLT interconnect trunk with identical PVST+ configurations. When you enable VLT, the show spanning-
tree pvst brief command output displays VLT information.
Dell#show spanning-tree pvst vlan 1000 brief
VLAN 1000
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 0, Address 90b1.1cf4.9b79
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 0, Address 90b1.1cf4.9b79
We are the root of Vlan 1000
Configured hello time 2, max age 20, forward delay 15
Interface
Name PortID
---------- -------- ---- ------
Po 1 128.2
Po 2 128.3
Te 1/10 128.230
Te 1/13 128.233
Interface
Name Role PortID
---------- ------ -------- ---- ------- ----------- ------- --------- ----
Po 1 Desg 128.2
Po 2 Desg 128.3
Te 1/10 Desg 128.230
Te 1/13 Desg 128.233
Dell#

Peer Routing Configuration Example

This section provides a detailed explanation of how to configure peer routing in a VLT domain.
In the following example, devices are configured as follows:
• Access switch A1 is connected to two VLT peers (Dell-1 and Dell-2).
• The two VLT peers are connected to an upstream switch R1.
• OSPF is configured in Dell-1, Dell-2, and R1 switches.
• Dell-1 is configured as the root bridge.
• Dell-1 is configured as the VLT primary.
• As the Router ID of Dell-1 is the highest in the topology (highest loopback address of 172.17.1.1), Dell-1 is the OSPF Designated Router.
• As the Router ID of Dell-2 is the second highest in the topology (172.16.1.1), Dell-2 is the OSPF Backup Designated Router.
Prio Cost Sts
----------- ------- -------------------- --------
128 188 FWD(vltI)
128 2000 FWD(vlt)
128 2000 FWD
128 2000 FWD
Prio Cost
128 188
128 2000
128 2000
128 2000
Designated
Cost Bridge ID
0 0
0 0
0 0
0 0
Sts Cost
FWD 0
FWD 0
FWD 0
FWD 0
PortID
90b1.1cf4.9b79 128.2
90b1.1cf4.9b79 128.3
90b1.1cf4.9b79 128.230
90b1.1cf4.9b79 128.233
Link-type Edge
(vltI)P2P No
(vlt) P2P No
P2P Yes
P2P No
Virtual Link Trunking (VLT) 1007