Configuring dhcp assist – Brocade TurboIron 24X Series Configuration Guide User Manual
Page 522

488
Brocade TurboIron 24X Series Configuration Guide
53-1003053-01
Configuring IP parameters – Layer 2 Switches
Syntax: ip ttl <1-255>
Configuring DHCP Assist
DHCP Assist allows a Layer 2 Switch to assist a router that is performing multi-netting on its
interfaces as part of its DHCP relay function.
DHCP Assist ensures that a DHCP server that manages multiple IP subnets can readily recognize
the requester IP subnet, even when that server is not on the client local LAN segment. The Layer 2
Switch does so by stamping each request with its IP gateway address in the DHCP discovery packet.
By allowing multiple subnet DHCP requests to be sent on the same wire, you can reduce the
number of router ports required to support secondary addressing as well as reduce the number of
DHCP servers required, by allowing a server to manage multiple subnet address assignments.
FIGURE 61
DHCP requests in a network without DHCP Assist on the Layer 2 Switch
In a network operating without DHCP Assist, hosts can be assigned IP addresses from the wrong
subnet range because a router with multiple subnets configured on an interface cannot distinguish
among DHCP discovery packets received from different subnets.
- ICX 6650 Hardware Installation Guide (98 pages)
- FastIron Ethernet Switch Administration Guide (362 pages)
- FastIron Ethernet Switch Feature and RFC Support Matrix (66 pages)
- FastIron Ethernet Switch Traffic Management Guide (100 pages)
- FastIron Ethernet Switch Stacking Configuration Guide (160 pages)
- FastIron Ethernet Switch Software Upgrade Guide (121 pages)
- FastIron Ethernet Switch Software Licensing Guide (58 pages)
- FastIron Ethernet Switch Security Configuration Guide (396 pages)
- FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide (454 pages)
- FastIron Ethernet Switch Layer 3 Routing Configuration Guide (672 pages)
- FastIron Ethernet Switch IP Multicast Configuration Guide (230 pages)
- FastIron SX, FCX, and ICX Diagnostic Reference (222 pages)
- ICX 7750 Hardware Installation Guide (80 pages)
- Network OS YANG Reference Manual v4.1.1 (238 pages)
- Network OS Software Licensing Guide v4.1.0 (34 pages)
- Network OS NETCONF Operations Guide v4.1.1 (622 pages)
- Network OS Message Reference v4.1.1 (478 pages)
- Network OS Feature and RFC Support Matrix (16 pages)
- Network OS Command Reference v4.1.0 (1418 pages)
- Network OS Administrator’s Guide v4.1.1 (748 pages)
- Mid-Mount Rack Kit (Switch) Installation Procedure (Supporting 300, 5100, 5300, 6505, 6510, 6520, 7800, 8000, VA-40FC, VDX 6710-54, and VDX 6740) (10 pages)
- Flush Mount Rack Kit Installation Procedure (Supporting VDX 6710-54, VDX 6720-24, VDX 6720-60, VDX 6730-32, VDX 6730-76, and VDX 6740) (10 pages)
- VDX 6710-54 QuickStart Guide (12 pages)
- VDX 6710-54 Hardware Reference Manual (72 pages)
- VDX 6730 Hardware Reference Manual (Supporting VDX 6730-32 and VDX 6730-76) (90 pages)
- VDX 6730 QuickStart Guide (Supporting VDX 6730-32 and VDX 6730-76) (12 pages)
- Fixed Rack Mount Kit Installation Procedure (Supporting 300, 5100, 5300, 6520, 7800, 8000) (12 pages)
- VDX 8770-8 Two-Post Flush and Mid-Mount Rack Kit Installation Procedure (8 pages)
- VDX 8770-8 QuickStart Guide (34 pages)
- VDX 8770-8 Hardware Reference Manual (136 pages)
- VDX 8770-8 Four-Post Flush and Recessed Mount Rack Kit Installation Procedure (10 pages)
- VDX 8770-4 Two-Post Flush and Mid-Mount Rack Kit Installation Procedure (10 pages)
- VDX 8770-4 QuickStart Guide (32 pages)
- VDX 8770-4 Hardware Reference Manual (132 pages)
- VDX 8770-4 Four-Post Flush Mount Rack Kit Installation Procedure (8 pages)
- VDX 8770-4 Four-Post Flush and Recessed Mount Intake Air Duct Rack Kit Installation Procedure (24 pages)
- VDX 6740 Hardware Reference Manual (Supporting VDX 6740, VDX 6740T, and VDX 6740T-1G) (78 pages)
- Universal Four Post Rack Kit Installation Procedure (Supporting VDX 6740T) (20 pages)
- Universal Two-Post Rack Kit Installation Procedure (Supporting VDX 6740T) (12 pages)
- FCX Series Hardware Installation Guide (112 pages)
- 6910 Ethernet Access Switch MIB Reference (102 pages)
- 6910 Ethernet Access Switch Hardware Installation Guide (84 pages)
- 6910 Ethernet Access Switch Diagnostic Guide (Supporting R2.2.0.0) (88 pages)
- 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) (1240 pages)
- Unified IP MIB Reference (Supporting Multi-Service IronWare Release 05.6.00a) (771 pages)