Specifications

Chapter 6. IBM Virtual Fabric 10Gb Switch Module implementation 271
Port 1:17 : Priority 128, Path Cost 0, auto
Port 1:18 : Priority 128, Path Cost 0, auto
Port 2:14 : Priority 128, Path Cost 0, auto, edge, Spanning Tree turned OFF
Port 2:17 : Priority 128, Path Cost 0, auto
Port 2:18 : Priority 128, Path Cost 0, auto
ACC-3#
ACC-3#
ACC-3#show spanning-tree stp 30 information
------------------------------------------------------------------
------------------------------------------------------------------
Spanning Tree Group 30: On (PVRST)
VLANs: 30
Current Root: Path-Cost Port Hello MaxAge FwdDel
001e 08:17:f4:32:c4:00 990 1:17 2 20 15
Parameters: Priority Hello MaxAge FwdDel Aging Topology Change Counts
61470 2 20 15 300 9
Port Prio Cost State Role Designated Bridge Des Port Type
------------- ---- ---------- ----- ---- ---------------------- -------- ----
1:14 0 0 DSB *
1:17 (pc1) 128 990!+ FWD ROOT 001e-08:17:f4:32:c4:00 8045 P2P
1:18 (pc2) 128 990!+ DISC ALTN 101e-fc:cf:62:9d:9a:00 8045 P2P
2:14 0 0 DSB *
2:17 (pc1) 128 990!+ FWD ROOT 001e-08:17:f4:32:c4:00 8045 P2P
2:18 (pc2) 128 990!+ DISC ALTN 101e-fc:cf:62:9d:9a:00 8045 P2P
* = STP turned off for this port.
! = Automatic path cost.
+ = Portchannel cost, not the individual port cost.
ACC-3#
6.4.4 Quality of Service
The Quality of Service (QoS) implementation in IBM Networking OS is not in the scope of the
reference architecture used in this book. However, a summary of configuration topics and
commands is presented here for completeness.
QoS commands configure the 802.1p priority value and DiffServ Code Point value of
incoming packets. You can then differentiate between various types of traffic, and provide
different priority levels.
802.1p configuration
This feature provides the switch the capability to filter IP packets based on the 802.1p bits in
the packet's VLAN header. The 802.1p bits specify the priority that you should give to the
packets while forwarding them. The packets with a higher (non-zero) priority bits are given
forwarding preference over packets with numerically lower priority bits value.