Brocade Communications Systems 8/80 Service Manual Page 35
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Switching and Routing
May 2012 © 2012 Brocade Communications Systems, Inc. 2 - 27
Syntax: show arp [<ip-addr> [<ip-mask>] | ethernet <portnum> mac-address <xxxx.xxxx.xxxx> [<mask>]]
The <ip-addr> and <ip-mask> parameters let you restrict the display to entries for a specific IP address and
network mask. Specify the IP address masks in standard decimal mask format (for example, 255.255.0.0).
NOTE: The <ip-mask> parameter and <mask> parameter perform different operations. The <ip-mask>
parameter specifies the network mask for a specific IP address, whereas the <mask> parameter provides a filter
for displaying multiple MAC addresses that have specific values in common.
Specify the MAC address mask as “f”s and “0”s, where “f”s are significant bits. Specify IP address masks in
standard decimal mask format (for example, 255.255.0.0).
The ethernet <portnum> parameter lets you restrict the display to entries for a specific port.
The mac-address <xxxx.xxxx.xxxx> parameter lets you restrict the display to entries for a specific MAC address.
The <mask> parameter lets you specify a mask for the mac-address <xxxx.xxxx.xxxx> parameter, to display
entries for multiple MAC addresses. Specify the MAC address mask as “f”s and “0”s, where “f”s are significant
bits.
Here are some examples of how to use these commands.
The following command displays all ARP entries for MAC addresses that begin with “abcd”:
ServerIron# show arp mac-address a.b.c.d ffff.0000.0000
The following command displays all IP address entries for IP addresses that begin with "209.157":
ServerIron# show arp 209.157.0.0 255.255.0.0
This show arp command displays the following information.
Table 2.2: CLI Display of ARP Cache
This Field... Displays...
IP The IP address of the device.
MAC The MAC address of the device.
Type The type, which can be one of the following:
• Dynamic – The ServerIron learned the entry from an incoming
packet.
• Static – You added the entry to the ARP table.
Port The port on which the entry was learned.
Age The number of minutes the entry has remained unused. If this value
reaches the ARP aging period, the entry is removed from the table.
Note: Static entries do not age out.
VlanId The port-based VLAN that the ServerIron port connected to the
entry’s MAC address is in.
Total ARP Entries The total number of entries in the cache. The total includes both
dynamic (learned) and static ARP entries.
- 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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