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Netgear M5300-52G3 Command Line Interface (CLI) User Manual - Page 291

auto-cost OSPF, bandwidth, auto-cost reference bandwidth, auto-cost

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ProSafe Managed Switch auto-cost (OSPF) By default, OSPF computes the link cost of each interface from the interface bandwidth. Faster links have lower metrics, making them more attractive in route selection. The configuration parameters in the auto-cost reference bandwidth and bandwidth commands give you control over the default link cost. You can configure for OSPF an interface bandwidth that is independent of the actual link speed. A second configuration parameter allows you to control the ratio of interface bandwidth to link cost. The link cost is computed as the ratio of a reference bandwidth to the interface bandwidth (ref_bw / interface bandwidth), where interface bandwidth is defined by the bandwidth command. Because the default reference bandwidth is 100 Mbps, OSPF uses the same default link cost for all interfaces whose bandwidth is 100 Mbps or greater. Use the auto-cost command to change the reference bandwidth, specifying the reference bandwidth in megabits per second (Mbps). The reference bandwidth range is 1-4294967 Mbps. The different reference bandwidth can be independently configured for OSPFv2 and OSPFv3. Default Format Mode 100Mbps auto-cost reference-bandwidth Router OSPF Config no auto-cost reference-bandwidth (OSPF) Use this command to set the reference bandwidth to the default value. Format Mode no auto-cost reference-bandwidth Router OSPF Config bandwidth By default, OSPF computes the link cost of an interface as the ratio of the reference bandwidth to the interface bandwidth. Reference bandwidth is specified with the auto-cost command. For the purpose of the OSPF link cost calculation, use the bandwidth command to specify the interface bandwidth. The bandwidth is specified in kilobits per second. If no bandwidth is configured, the bandwidth defaults to the actual interface bandwidth for port-based routing interfaces and to 10 Mbps for VLAN routing interfaces. This command does not affect the actual speed of an interface. Default Format Mode actual interface bandwidth bandwidth Interface Config Routing Commands 291

Section	Page
ProSafe Managed Switch	1
Contents	3
1. Using the Command-Line Interface	8
Licensing and Command Support	8
Command Syntax	10
Command Conventions	11
Common Parameter Values	11
Unit/Slot/Port Naming Convention	12
Using a Command’s “No” Form	13
Managed Switch Modules	13
Command Modes	14
Command Completion and Abbreviation	17
CLI Error Messages	18
CLI Line-Editing Conventions	18
Using CLI Help	19
Accessing the CLI	20
2. Stacking Commands	21
Dedicated Port Stacking	21
Stacking Commands	29
Non-Stop Forwarding Commands	31
Stack Firmware Synchronization Commands	35
3. Switching Commands	38
Port Configuration Commands	39
Loopback Interface Commands	45
Spanning Tree Protocol (STP) Commands	47
VLAN Commands	64
Double VLAN Commands	77
Voice VLAN Commands	80
Provisioning (IEEE 802.1p) Commands	82
Protected Ports Commands	82
Private Group Commands	85
Private VLAN	86
GARP Commands	90
GVRP Commands	92
GMRP Commands	94
Port-Based Network Access Control Commands	96
802.1X Supplicant Commands	109
Storm-Control Commands	112
Flow Control Commands	122
Port-Channel/LAG (802.3ad) Commands	123
Port Mirroring	139
Static MAC Filtering	141
DHCP L2 Relay Agent Commands	145
DHCP Client Commands	149
DHCP Snooping Configuration Commands	150
Dynamic ARP Inspection Commands	159
IGMP Snooping Configuration Commands	166
IGMP Snooping Querier Commands	177
MLD Snooping Commands	180
MLD Snooping Querier Commands	187
set mld querier	187
set mld querier query_interval	188
set mld querier timer expiry	188
set mld querier election participate	189
show mldsnooping querier	189
Port Security Commands	190
LLDP (802.1AB) Commands	194
LLDP-MED Commands	203
Denial of Service Commands	212
MAC Database Commands	222
ISDP Commands	224
Priority-Based Flow Control Commands	229
4. Multicast VLAN Registration (MVR)	232
About MVR	232
MVR Commands	232
5. Routing Commands	240
Address Resolution Protocol (ARP) Commands	240
IP Routing Commands	246
Router Discovery Protocol Commands	263
Virtual LAN Routing Commands	266
Virtual Router Redundancy Protocol Commands	267
DHCP and BOOTP Relay Commands	276
IP Helper Commands	278
Open Shortest Path First (OSPF) Commands	282
OSPF Graceful Restart Commands	322
nsf	323
nsf restart-interval	323
nsf helper	324
nsf helper disable	325
nsf [ietf] helper strict-lsa-checking	325
OSPF Interface Flap Dampening Commands	327
Routing Information Protocol (RIP) Commands	329
ICMP Throttling Commands	336
6. IP Multicast Commands	339
Multicast Commands	339
DVMRP Commands	344
PIM Commands	349
Internet Group Message Protocol (IGMP) Commands	360
IGMP Proxy Commands	367
7. IPv6 Commands	373
Tunnel Interface Commands	373
IPv6 Routing Commands	375
OSPFv3 Commands	398
OSPFv3 Graceful Restart Commands	429
DHCPv6 Commands	431
8. IPv6 Multicast Commands	439
IPv6 Multicast Forwarder Commands	439
IPv6 PIM Commands	442
IPv6 MLD Commands	449
IPv6 MLD-Proxy Commands	455
9. Quality of Service (QoS) Commands	461
Class of Service (CoS) Commands	461
Differentiated Services (DiffServ) Commands	469
DiffServ Class Commands	470
DiffServ Policy Commands	479
DiffServ Service Commands	484
DiffServ Show Commands	485
MAC Access Control List (ACL) Commands	491
IP Access Control List (ACL) Commands	495
IPv6 Access Control List (ACL) Commands	502
Time Range Commands for Time-Based ACLs	506
AutoVOIP	508
iSCSI Commands	512
10. Power over Ethernet (PoE) Commands	518
About PoE	518
PoE Commands	519
11. Utility Commands	529
Auto Install Commands	530
Dual Image Commands	532
System Information and Statistics Commands	534
Logging Commands	550
Email Alerting and Mail Server Commands	556
System Utility and Clear Commands	562
Simple Network Time Protocol (SNTP) Commands	572
DHCP Server Commands	579
DNS Client Commands	591
Packet Capture Commands	595
Serviceability Packet Tracing Commands	598
Cable Test Command	617
sFlow Commands	617
Software License Commands	622
IP Address Conflict Commands	623
Link Local Protocol Filtering Commands	624
RMON Stats and History Commands	625
UDLD Commands	631
12. Management Commands	635
Configuring the Switch Management CPU	636
Network Interface Commands	638
Console Port Access Commands	641
Telnet Commands	643
Secure Shell (SSH) Commands	648
Management Security Commands	651
Hypertext Transfer Protocol (HTTP) Commands	652
Access Commands	659
User Account Commands	659
SNMP Commands	683
RADIUS Commands	694
TACACS+ Commands	706
Configuration Scripting Commands	711
Pre-Login Banner and System Prompt Commands	713
Switch Database Management (SDM) Templates	714
IPv6 Management Commands	716
13. Log Messages	721
Core	722
Utilities	724
Management	726
Switching	730
QoS	736
Routing/IPv6 Routing	737
Multicast	740
Stacking	742
Technologies	743
O/S Support	745
14. Captive Portal Commands	747
Captive Portal Global Commands	747
Captive Portal Configuration Commands	751
Captive Portal Status Commands	757
Captive Portal Client Connection Commands	761
Captive Portal Interface Commands	765
Captive Portal Local User Commands	766
Captive Portal User Group Commands	772

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Routing Commands

291

ProSafe Managed Switch

auto-cost (OSPF)

By default, OSPF computes the link cost of each interface from the interface bandwidth.

Faster links have lower metrics, making them more attractive in route selection. The

configuration parameters in the

auto-cost reference bandwidth

and

bandwidth

commands give you control over the default link cost. You can configure for OSPF an

interface bandwidth that is independent of the actual link speed. A second configuration

parameter allows you to control the ratio of interface bandwidth to link cost. The link cost is

computed as the ratio of a reference bandwidth to the interface bandwidth (ref_bw / interface

bandwidth), where interface bandwidth is defined by the

bandwidth

command. Because the

default reference bandwidth is 100 Mbps, OSPF uses the same default link cost for all

interfaces whose bandwidth is 100 Mbps or greater. Use the

auto-cost

command to

change the reference bandwidth, specifying the reference bandwidth in megabits per second

(Mbps). The reference bandwidth range is 1-4294967 Mbps. The different reference

bandwidth can be independently configured for OSPFv2 and OSPFv3.

Default

Format

auto-cost reference-bandwidth <

1 to 4294967

Mode

no auto-cost reference-bandwidth (OSPF)

Use this command to set the reference bandwidth to the default value.

Format

no auto-cost reference-bandwidth

Mode

bandwidth

By default, OSPF computes the link cost of an interface as the ratio of the reference

bandwidth to the interface bandwidth. Reference bandwidth is specified with the

auto-cost

command. For the purpose of the OSPF link cost calculation, use the bandwidth command to

specify the interface bandwidth. The bandwidth is specified in kilobits per second. If no

bandwidth is configured, the bandwidth defaults to the actual interface bandwidth for

port-based routing interfaces and to 10 Mbps for VLAN routing interfaces. This command

does not affect the actual speed of an interface.

Default

Format

bandwidth

1-10000000

Mode

100Mbps

Router OSPF Config

actual interface bandwidth

Interface Config