© 2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 7 of 41
Table 4 summarizes the assignment of eight fabric links with the
max-link
parameter set to 8; the interfaces are
divided into eight groups.
Table 4.
Interface Assignment with Two Fabric Links
Interface
Fabric Link
1 and 2
Fabric link 1
3 and 4
Fabric link 2
5 and 6
Fabric link 3
7 and 8
Fabric link 4
9 and 10
Fabric link 5
11 and 12
Fabric link 6
13 and 14
Fabric link 7
15 and 16
Fabric link 8
Note:
The assignment of the host-side ports is always based on the configured
max-link
parameter and not the
actual physical number of fabric ports connected. Be sure to match the
max-link
parameter with the actual number
of physical links used.
Note:
The relationship of host-side ports to parent switch fabric ports is static. If a fabric interface fails, all its
associated host interfaces are brought down and will remain down until the fabric interface is restored.
PortChannel Fabric Interface Connection
The PortChannel fabric interface provides an alternative method of connection between the parent switch and the
Cisco Nexus B22HP fabric extender. In this mode of operation, the physical fabric links are bundled into a single
logical channel. This approach prevents a single fabric interconnect link loss from disrupting traffic to any one
server. The total bandwidth of the logical channel is shared by all the servers, and traffic is spread across the
members through the use of a hash algorithm.
●
For a Layer 2 frame, the switch uses the source and destination MAC addresses.
●
For a Layer 3 frame, the switch uses the source and destination MAC addresses and the source and
destination IP addresses.
Since both redundancy and increased bandwidth are possible, configuration of the fabric links on a PortChannel is
the most popular connection option.
