Brocade Communications Systems 8/80 Service Manual Page 16
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ServerIron Switching and Routing Guide
2 - 8 © 2012 Brocade Communications Systems, Inc. May 2012
Syntax: [no] tftp client enable vlan <vlan-id>
Disabling or Re-enabling Dynamic Discovery of Protocol
VLANs
Dynamic discovery of protocol VLANs on switch-to-switch links enables switch-to-switch links to be automatically
included in protocol VLANs that have dynamic port membership.
By default, the command is enabled. To disable dynamic discovery of protocol VLANs on switch-to-switch links,
enter the following command:
ServerIron(config)#no vlan-dynamic-discovery
Syntax: [no] vlan-dynamic-discovery
Setting the Maximum Number of VLANs
You can adjust the maximum number of VLANs that are supported on a ServerIron using the following command:
ServerIron(config)# vlan max-vlan 128
Syntax: [no] vlan max-vlan <value>
The <value> variable can be set to a number in the following range: 1 – 4095. The default is 32.
Defining a large number of VLANs on a ServerIron reduces the number of VIPs possible because the system
creates internal MAC addresses for VIPs. Creating a large number of VLANs can cause you to reach the
maximum available MAC limit.
NOTE: Changing the maximum VLAN values using this command requires a system reload.
Assigning Tagged or Untagged Ports to a Port-Based VLAN
Once a port-based VLAN is created, port membership for that VLAN must be defined. To assign a port to a port-
based VLAN, either the tagged or untagged command is used. When a port is tagged, it can be a member of
multiple port-based VLANs.
When a port is tagged, it allows communication among the different VLANs to which it is assigned. A common
use for this might be to place an email server that multiple groups may need access to on a tagged port, that in
turn, is resident in all VLANs that members need access to the server.
Suppose you want to make port 5 (module 5), a member of port-based VLAN 4, a tagged port. Enter commands
such as the following:
ServerIron(config)#vlan 4
ServerIron(config-vlan-4)#tagged ethernet 3/5
To assign all ports on a 16-port ServerIron except port 5 (module 3) as untagged to a VLAN, assign ports 1-4 and
6-16 to VLAN 4, enter commands such as the following:
ServerIron(config)#vlan 4
ServerIron(config-vlan-4)#untagged ethernet 3/1 to 3/4 e 3/6 to 3/16
Syntax: [no] tagged ethernet <portnum> [to <portnum> [ethernet <portnum>]]
Syntax: [no] untagged ethernet <portnum> [to <portnum> ethernet <portnum>]
Configuring Uplink Ports
When you configure a set of ports within a port-based VLAN as uplink ports for the VLAN, all broadcast and
unknown-unicast traffic goes only to the uplink ports, not to the other ports in the VLAN.
To configure a port-based VLAN containing uplink ports, enter commands such as the following:
ServerIron(config)# vlan 10 by port
- ServerIron Traffic Works 1
- Contents 3
- Chapter 1 7
- About this Guide 7
- Getting technical help 8
- Document feedback 8
- Chapter 2 9
- Static MAC Entries 10
- Displaying MAC Addresses 10
- Configuring Fast Port Span 11
- Configuring Fast Uplink Span 11
- Trunk Groups 14
- Changing the Tag Type 15
- Enabling Aggregated VLAN 15
- Configuring Uplink Ports 16
- Setting a Priority for a VLAN 17
- Dual-Mode VLAN Ports 20
- MAC Filters 22
- Setting the MAC Age Time 24
- Address-Lock Filters 25
- Setting the Broadcast Limit 26
- Assigning a Gateway List 26
- Multicast 27
- Adding an IP Interface 28
- Adding a Static IP Route 30
- Adding a Static ARP Entry 30
- Clearing the ARP Cache 31
- Clearing the IP Cache 31
- Setting System Max 31
- Adding a Static MAC Address 32
- Displaying the IP Host Table 34
- Displaying Static ARP Entries 36
- Displaying the IP Route Table 37
- Disabling Layer 2 Switching 40
- Configuring an IP Interface 40
- Configuring an IP Filter 41
- SLB Example 42
- TCS Uses of Filters 42
- Setting the TTL 43
- Enabling RIP 44
- RIP Timers 45
- Enabling Redistribution 46
- Denying Redistribution 46
- Permitting Redistribution 47
- Learning RIP Default Routes 48
- Dynamic Link Aggregation 49
- Valid Aggregate Links 50
- Flexible Trunk Eligibility 52
- Enabling Link Aggregation 53
- Link Aggregation Parameters 55
- About Blocked Ports 57
- Switching and Routing 61
- Syntax: clear link-aggregate 61
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