Enterasys Matrix 7G4270-12 Скачать руководство пользователя страница 15 | Manualshive

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Understanding QoS Configuration on the Matrix N-Series

February 22, 2008

Page 15 of 29

The

set

cos

port

‐

resource

irl

command

is

used

for

creating

inbound

rate

limiters.

You

need

to:

•

Identify

the

port

group

for

configuration

•

Identify

the

limiter

resource

ID,

along

with

desired

unit,

rate,

and

actions

Configuring CoS Reference Mapping

The

CoS

Reference

Table

maps

the

TxQ

and

IRL

references,

defined

by

you

and

configured

in

the

CoS

Settings

Table,

to

physical

queues

and

rate

limiters

created

in

the

port

‐

resource

table.

A

CoS

reference

table

exists

for

each

port

group.

The

CoS

reference

table

indexes

can

be

thought

of

as

virtual

queues

or

rate

limiters.

The

table

accounts

for

the

maximum

number

of

queues

and

rate

limiters

supported

by

the

device.

The

virtual

queues

and

limiters

map

to

the

physical

queues

and

rate

limiters.

The

TxQ

Reference

Table

is

populated

by

default,

because

queues

are

required

for

all

forwarding.

The

TxQ

reference

maps

each

reference

value

to

a

physical

queue.

The

IRL

Reference

Table

is

not

configured

by

default,

because

inbound

rate

limiting

is

optional.

CoS TxQ Reference Mapping

The

CoS

TxQ

reference

table

uses

16

indexes

or

virtual

queues,

and

maps

each

to

a

physical

queue

or

resource.

A

TxQ

reference

table

exists

for

each

port

group

configured

and

is

indexed

similarly

to

port

‐

resources,

as

port

‐

group.port

‐

type

reference

.

For

port

‐

types

with

16

queues,

the

16

‐

txq

reference

indexes

map

directly

to

the

16

physical

queues.

For

port

‐

types

with

4

queues,

the

16

‐

txq

reference

indexes

map:

solutions-r1(su)->show cos port-resource irl

'?' after the rate value indicates an invalid rate value

Group Index Resource Type Unit Rate Rate Limit Type Action
----------- -------- ---- ---- ----------   --------------- ------
0.0    0    irl perc none     drop    none
0.0    1    irl perc none     drop    none
0.0    2    irl perc none     drop    none
0.0    3    irl perc none     drop    none
.
.
.
0.0    26   irl perc none     drop    none
0.0    27   irl perc none     drop    none
0.0    28   irl perc none     drop    none
0.0    29   irl perc none     drop    none
0.0    30   irl perc none     drop    none
0.0    31   irl perc none     drop    none
0.1    0    irl perc none     drop    none
0.1    1    irl perc none     drop    none
0.1    2    irl perc none     drop    none
0.1    3    irl perc none     drop    none
0.1    4    irl perc none     drop    none
0.1    5    irl perc none     drop    none
0.1    6    irl perc none     drop    none
0.1    7    irl perc none     drop    none

No violators exist for this/these irl(s)

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Содержание Matrix 7G4270-12

Страница 1: ...t Packet preference and forwarding treatment for a given flow can be applied to roles configured in Enterasys policy Why Would I Use It in My Network Without QoS all packets are treated as though the...

Страница 2: ...g the bandwidth in a manner that aligns the delivery characteristics of a given flow with the available port resources In a QoS context a flow is a stream of IP packets that are classified with the sa...

Страница 3: ...S Each CoS can be mapped to an 802 1p priority and a ToS rewrite value The 802 1p parameter is A subset of ToS with values 0 7 upper 3 bits of the 8 bit ToS field Supported in both layer 2 and layer 3...

Страница 4: ...ments for packet forwarding strict weighted fair and hybrid Strict Queuing With Strict Priority Queuing a higher priority queue must be empty before a lower priority queue can transmit any packets Str...

Страница 5: ...enter on the upper left of the box and proceed to the appropriate priority queue Outbound packets exit the queues on the lower right Queue 3 has access to its percentage of time slices so long as the...

Страница 6: ...g queues with queue 2 receiving 50 percent of the remaining time slices and the other queues receiving 25 percent each The benefit of hybrid queueing is that queues configured as strict will receive a...

Страница 7: ...ability of bandwidth for other traffic by preventing the rate limited traffic from consuming more than the assigned amount of a network s resources Rate limiting accomplishes this by setting a cap on...

Страница 8: ...d out when it bursts above the assigned threshold with rate shaping applied Figure 6 Rate Shaping Smoothing Behavior Rate shaping retains excess packets in a queue and then schedules these packets for...

Страница 9: ...ice entry consists of an entry index an 802 1p priority an optional ToS value a transmit queue reference and an optional IRL reference CoS State A global setting that must be enabled for a configured...

Страница 10: ...ted to each type The following example displays default values for the show cos port type txq command output IRL Type 0 supports thirty two Inbound Rate Limiters while type 1 supports eight Use the sh...

Страница 11: ...of the same port type as defined by the port group you are associating it with The creation of additional port groups could be used to combine similar ports by their function for flexibility For inst...

Страница 12: ...and the number of slices allotted to the group Queuing is also displayed by percentage The following example displays default values for the show cos port config txq command output Additional port gro...

Страница 13: ...Remember group 0 0 supports 16 TxQ resources and 32 IRL resources while group 0 1 supports 4 TxQ resources and 8 IRL resources Resources exist for each port group and are indexed as port group port ty...

Страница 14: ...s resources for each port group created along with the index as described above By default no resources are configured for IRL port resources Rates displayed as none indicate no resources exist The de...

Страница 15: ...default because inbound rate limiting is optional CoS TxQ Reference Mapping The CoS TxQ reference table uses 16 indexes or virtual queues and maps each to a physical queue or resource A TxQ reference...

Страница 16: ...ce table is populated by default the Queue to Reference mapping can be configured using the set cos reference txq command You need to Identify the port group for configuration Identify the transmit qu...

Страница 17: ...re indicated by rate limiter none You need to Identify the port group for configuration Identify the rate limit reference Configuring the CoS Index The CoS settings table assigns a priority a ToS valu...

Страница 18: ...f a TxQ reference value is not chosen TxQ reference 0 will be assigned The reference does not indicate the actual transmit queue to be assigned by CoS it points to the CoS TxQ Reference Mapping Table...

Страница 19: ...CoS results in the restoration of current port level settings Use the set cos state enable command to enable CoS state globally for this system Use the set cos state disable command to disable CoS st...

Страница 20: ...he SecureStack For the C3 IRL configuration is only supported within a policy role context Configuration of IRLs within rules are not supported In a mixed stack C3 CoS feature limitations apply soluti...

Страница 21: ...Configure a Class of Service transmit queue port resource entry by mapping a port group with a transmit queue and applying a TxQ rate shaping value to the mapping Verify configuration changes Matrix...

Страница 22: ...RL to port group mappings are associated with the inbound rate limiter reference Matrix su set cos settings index priority priority tos value tos txq reference reference irl reference reference Matrix...

Страница 23: ...scussion to the VoIP configuration context Table 1 provides a set of sample values for priority IRL and transmit queue across a number of real world traffic types This table can be used as an aid in t...

Страница 24: ...d core to handle ToS rate limit and queue configuration for these devices The H 323 call setup profile will be configured so that TCP call setup traffic on the TCP destination port 1720 10 0 0 1 of it...

Страница 25: ...ate CoS 8 as the action for the rule Setting the VoIP Edge Policy Profile Switch 1 For DFE Switch 1 we configure a separate policy for VoIP edge VoIP edge policy deals with packets transiting the edge...

Страница 26: ...5 Enable TCI overwrite so that ToS will be rewritten for this policy Create a Policy Service Name the service H323CallSetup Service Apply the service to the H323CallSetup Policy Role Create a Rate lim...

Страница 27: ...cos 5 egress vlans 22 tci overwrite enable Matrix su set policy rule admin profile vlantag 22 mask 12 port string ge 1 2 5 admin pid 1 Matrix su set policy rule 1 vlantag 22 mask 12 vlan 22 cos 8 Matr...

Страница 28: ...t share a common class of service and forwarding treatment as they transit the interface Forwarding Treatment Queue behavior during the packet egress stage strict Weighted Fair Hybrid Jitter The chang...

Страница 29: ...DOCUMENT WEB SITE OR THE INFORMATION CONTAINED IN THEM EVEN IF ENTERASYS NETWORKS HAS BEEN ADVISED OF KNEW OF OR SHOULD HAVE KNOWN OF THE POSSIBILITY OF SUCH DAMAGES Enterasys Networks Inc 50 Minutema...

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