Preparing For Configurations; Default Configurations Of Arp - Raisecom ISCOM2600G-HI (A) Series Configuration Manual

Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
Resolution Protocol (ARP) is applied to resolve IP address to MAC address and configure
mapping between IP address and MAC address.
The ARP address table contains the following two types:


The ISCOM2600G-HI series switch supports the following two modes of dynamically
learning ARP address entries:
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

5.3.2 Preparing for configurations

Scenario
The mapping of IP address and MAC address is saved in the ARP address mapping table.
Generally, ARP address mapping table is dynamically maintained by the ISCOM2600G-HI
series switch. The ISCOM2600G-HI series switch searches for the mapping between IP
address and MAC address automatically according to ARP. You just need to configure the
ISCOM2600G-HI series switch manually for preventing ARP dynamic learning from cheating
and adding static ARP address entries.
Prerequisite
N/A

5.3.3 Default configurations of ARP

Default configurations of ARP are as below.
Static ARP entry
Dynamic ARP entry learning mode
Static entry: bind the IP address and MAC address to avoid ARP dynamic learning
cheating.
− The static ARP address entry needs to be added/deleted manually.
The static ARP address entry is not aged.
−
Dynamic entry: MAC address automatically learned through ARP.
− This dynamic ARP address entry is automatically generated by switch. You can adjust
partial parameters of it manually.
− The dynamic ARP address entry will be aged after the aging time if not used.
Learn-all: in this mode, the ISCOM2600G-HI series switch learns both ARP request
packets and response packets. When device A sends its ARP request, it writes mapping
between its IP address and physical address in ARP request packets. When device B
receives ARP request packets from device A, it learns the mapping in its address table. In
this way, device B will no longer send ARP request when sending packets to device A.
learn-reply-only mode: in this mode, the ISCOM2600G-HI series switch learns ARP
response packets with corresponding ARP request only sent by itself. For ARP request
packets from other devices, it responds with ARP response packets only rather than
learning ARP address mapping entry. In this way, network load is heavier but some
network attacks based on ARP request packets can be prevented.
Function
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Default value
N/A
learn-all
213