Cabletron Systems SSIM-R8-02 Specifikace stáhnout pdf (Strana 120)

Configuring IP Interfaces and Parameters

100 Enterasys Xpedition User Reference Manual

When you enable packets to be dropped for hosts with unresolved MAC addresses, the

XP will still attempt to periodically resolve these MAC addresses. By default, the XP sends

ARP requests at 30-second intervals to try to resolve up to 50 dropped entries.

To change the interval for sending ARP requests for unresolved entries to 45 seconds:

To change the number of unresolved entries that the XP attempts to resolve to 75:

Configuring Proxy ARP

The XP can be configured for proxy ARP. The XP uses proxy ARP (as defined in RFC 1027)

to help hosts with no knowledge of routing determine the MAC address of hosts on other

networks or subnets. Through proxy ARP, the XP will respond to ARP requests from a

host with a ARP reply packet containing the XP MAC address. Proxy ARP is enabled by

default on the XP. The following example disables proxy ARP on all interfaces:

Configuring Reverse Address Resolution Protocol (RARP)

Reverse Address Resolution Protocol (RARP) works exactly the opposite of ARP. Taking a

MAC address as input, RARP determines the associated IP address. RARP is useful for X-

terminals and diskless workstations that may not have an IP address when they boot.

They can submit their MAC address to a RARP server on the XP, which returns an IP

address.

Configuring RARP on the XP consists of two steps:

1. Letting the XP know which IP interfaces to respond to

2. Defining the mappings of MAC addresses to IP addresses

ssr# arp set unresolve-timer 45

ssr# arp set unresolve-threshold 75

ssr(config)# ip disable-proxy-arp interface all

1 2 ... 115 116 117 118 119 120 121 122 123 124 125 ... 393 394

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Cabletron Systems SSIM-R8-02 Specifikace Strana 120