HP StorageWorks 2/16V HP StorageWorks Fabric OS 5.3.x administrator guide (569 - Page 391

Port Numbering on the 400 MP Router, MP Router port numbering

Page 391 highlights

Port Numbering on the 400 MP Router You do not need to specify slot numbers for the 400 MP Router. Refer to the GbE ports as ge0 and ge1, and the Fibre Channel ports are numbered 0 through 15. Moving from left to right on the front of the chassis, the sixteen Fibre Channel ports, followed by the 2 GbE ports. You manage the 400 MP Router as if it had 32 Fibre Channel ports (16 standard Fibre Channel ports, and 16 virtual Fibre Channel Ports) and 2 GbE ports. Specify port addresses using the slot and port numbers. For example, to disable VE_Port 18 on slot 1, use portDisable 1/18. To disable GbE port 1 on slot 1, use portDisable 1/ge1. FC0 Figure 30 400 MP Router port numbering Tunneling and Qos policies FC15 GbE0 GbE1 Quality of Service (QoS) refers to policies for handling differences in data traffic. These policies are based on data characteristics and delivery requirements. For example, ordinary data traffic is tolerant of delays and dropped packets, but voice and video data are not. QoS policies provide a framework for accommodating these differences in data as it passes through a network. Layer three DiffServ Code Points (DSCP) Layer three class of service DiffServ Code Points (DSCP) refers to a specific IEEE 802.1p VLAN tag priority implementation for establishing QoS policies. DSCP uses six bits of the Type of Service (TOS) field in the 802.1p header, which allows up to 64 different values to associate with data traffic priority. DSCP settings are useful only if IP routers are configured to enforce QoS policies uniformly within the network. IP routers use the DSCP value as an index into a Per Hop Behavior (PHB) table. Control connections and data connections may be configured with different DSCP values. Before configuring DSCP settings, determine if the IP network you are using implements PHB, and consult with the network administrator to determine the appropriate DSCP values. An older prioritization scheme (sometimes called Layer Two Class of Service, or CoS), used only the upper three bits of the TOS field, allowing eight priorities. If the IP network you are using has implemented this scheme, Table 98 may be of use in mapping CoS priorities to DSCP priorities when consulting with the network administrator. Table 98 Mapping CoS priorities to DSCP priorities CoS priority/bits DSCP priority/bits 0 / 000 1 / 001 2 / 010 3 / 011 4 / 100 5 / 101 6 / 110 7 / 111 0 / 000000 8 / 001000 16 / 010000 24 / 011000 32 / 100000 40 / 101000 48 / 110000 56 / 111000 Fabric OS 5.3.0 administrator guide 397

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Fabric OS 5.3.0 administrator guide
397
Port Numbering on the 400 MP Router
You do not need to specify slot numbers for the 400 MP Router. Refer to the GbE ports as ge0 and ge1,
and the Fibre Channel ports are numbered 0 through 15. Moving from left to right on the front of the
chassis, the sixteen Fibre Channel ports, followed by the 2 GbE ports.
You manage the 400 MP Router as if it had 32 Fibre Channel ports (16 standard Fibre Channel ports, and
16 virtual Fibre Channel Ports) and 2 GbE ports. Specify port addresses using the slot and port numbers.
For example, to disable VE_Port 18 on slot 1, use
portDisable 1/18
. To disable GbE port 1 on slot 1,
use
portDisable 1/ge1
.
Figure 30
400 MP Router port numbering
Tunneling and Qos policies
Quality of Service (QoS) refers to policies for handling differences in data traffic. These policies are based
on data characteristics and delivery requirements. For example, ordinary data traffic is tolerant of delays
and dropped packets, but voice and video data are not. QoS policies provide a framework for
accommodating these differences in data as it passes through a network.
Layer three DiffServ Code Points (DSCP)
Layer three class of service DiffServ Code Points (DSCP) refers to a specific IEEE 802.1p VLAN tag priority
implementation for establishing QoS policies. DSCP uses six bits of the Type of Service (TOS) field in the
802.1p header, which allows up to 64 different values to associate with data traffic priority.
DSCP settings are useful only if IP routers are configured to enforce QoS policies uniformly within the
network. IP routers use the DSCP value as an index into a Per Hop Behavior (PHB) table. Control
connections and data connections may be configured with different DSCP values. Before configuring DSCP
settings, determine if the IP network you are using implements PHB, and consult with the network
administrator to determine the appropriate DSCP values.
An older prioritization scheme (sometimes called Layer Two Class of Service, or CoS), used only the upper
three bits of the TOS field, allowing eight priorities. If the IP network you are using has implemented this
scheme,
Table 98
may be of use in mapping CoS priorities to DSCP priorities when consulting with the
network administrator.
GbE0
GbE1
FC0
FC15
Table 98
Mapping CoS priorities to DSCP priorities
CoS priority/bits
DSCP priority/bits
0 / 000
0 / 000000
1 / 001
8 / 001000
2 / 010
16 / 010000
3 / 011
24 / 011000
4 / 100
32 / 100000
5 / 101
40 / 101000
6 / 110
48 / 110000
7 / 111
56 / 111000