09-17-2014 07:04 AM - edited 03-07-2019 08:47 PM
Hello!
As mentioned in documents "All FabricPath VLANs use conversational MAC address learning."
Here my configuration-
vlan 100-200,252
mode fabricpath
Configured 2 interfaces vlan with ip addresses-
n7k-right-bor-core# sh ip int br | exc unas
IP Interface Status for VRF "default"(1)
Interface IP Address Interface Status
Vlan100 10.89.0.3 protocol-up/link-up/admin-up
Vlan252 10.89.252.3 protocol-up/link-up/admin-up
n7k-right-bor-core# sh vlan id 100
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
100 VLAN0100 active Po61, Po62, Po4000, Eth1/17
Eth1/18, Eth1/45, Eth1/46
Eth1/47, Eth1/48
VLAN Type Vlan-mode
---- ----- ----------
100 enet FABRICPATH
Remote SPAN VLAN
----------------
Disabled
Primary Secondary Type Ports
------- --------- --------------- -------------------------------------------
n7k-right-bor-core# sh vlan id 252
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
252 ILO active Po61, Po62, Po4000, Eth1/17
Eth1/18, Eth1/45, Eth1/46
Eth1/47, Eth1/48
VLAN Type Vlan-mode
---- ----- ----------
252 enet FABRICPATH
Remote SPAN VLAN
----------------
Disabled
Primary Secondary Type Ports
------- --------- --------------- -------------------------------------------
All above means that vlan 100 and vlan 252 should use conversational MAC address learning.
But from that output it is not. Why it is so?
Mike
n7k-right-bor-core# sh mac address-table learning-mode
Vlan/BD Learning Mode
---- ----------
1 Non-Conversational-Learning
100 Non-Conversational-Learning
101 Conversational-Learning
102 Conversational-Learning
103 Conversational-Learning
104 Conversational-Learning
….
198 Conversational-Learning
199 Conversational-Learning
200 Conversational-Learning
252 Non-Conversational-Learning
09-30-2015 10:28 AM
rmv72:
This is because you have configured SVIs for those Vlans, see below. See attached a 5K configuration guide that reference the below document on page 12.
Information About Conversational MAC Address Learning
You can use conversational MAC address learning or traditional MAC address learning.
To use conversational MAC address learning, you must do the following:
• Enable FabricPath.
• Ensure VLANs do not have switch virtual interface (SVI) enabled.
Conversational MAC address learning means that each switch learns only those MAC addresses for
interested hosts, rather than all MAC addresses in the domain. Each switch learns only those MAC
addresses that are actively speaking with it. In this way, conversational MAC learning consists of a
three-way handshake.
This selective learning, or conversational MAC address learning, allows you to scale the network beyond
the limits of individual switch MAC address tables.
All FabricPath VLANs use conversational MAC address learning.
Note CE VLANs support only traditional MAC address learning, where each switch learns the MAC addresses
of all hosts in the network.
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