BigIron RX Series Configuration Guide
147
53-1001810-01
The IP packet flow
7
4. If there is no match in the IP routing table and a default route is not configured, the packet is
dropped. For an IP packet whose destination IP address is to a directly connected host, the first
packet is forwarded to the CPU. If the ARP is resolved and the host is reachable, the CPU
creates a route entry in the hardware to route subsequent packets in hardware.
The software enables you to display the ARP cache and static ARP table, the IP route table, the IP
forwarding cache.
ARP cache table
The Address Resolution Protocol (ARP) is supported on the device. Refer to
“IP fragmentation
protection”
on page 178.
The ARP cache contains entries that map IP addresses to MAC addresses. Generally, the entries
are for devices that are directly attached to the device.
An exception is an ARP entry for an interface-based static IP route that goes to a destination that is
one or more router hops away. For this type of entry, the MAC address is either the destination
device’s MAC address or the MAC address of the router interface that answered an ARP request on
behalf of the device, using proxy ARP.
The ARP cache can contain dynamic (learned) entries and static (user-configured) entries. The
software places a dynamic entry in the ARP cache when the device learns a device’s MAC address
from an ARP request or ARP reply from the device.
The software can learn an entry when the device receives an ARP request from another IP
forwarding device or an ARP reply. Here is an example of a dynamic entry.
Each entry contains the destination device’s IP address and MAC address.
Static ARP table
In addition to the ARP cache, the device has a static ARP table.
Entries in the static ARP table are user-configured. You can add entries to the static ARP table
regardless of whether the device the entry is for is connected to the device.
The software places an entry from the static ARP table into the ARP cache when the entry’s
interface comes up.
Here is an example of a static ARP entry.
Index IP Address MAC Address Port
1 207.95.6.111 0800.093b.d210 1/1
Each entry lists the information you specified when you created the entry.
To display ARP entries, refer to the following:
•
“Displaying the ARP cache”
on page 217
•
“Displaying the static ARP table”
on page 218
To configure other ARP parameters, refer to
“IP fragmentation protection”
on page 178.
IP Address MAC Address Type Age Port
1 207.95.6.102 0800.5afc.ea21 Dynamic 0 6
Содержание Brocade DCX
Страница 40: ...xl BigIron RX Series Configuration Guide 53 1001810 01 ...
Страница 72: ...lxxii BigIron RX Series Configuration Guide 53 1001810 01 ...
Страница 88: ...16 BigIron RX Series Configuration Guide 53 1001810 01 Searching and filtering output 1 ...
Страница 300: ...228 BigIron RX Series Configuration Guide 53 1001810 01 Displaying IP information 7 ...
Страница 318: ...246 BigIron RX Series Configuration Guide 53 1001810 01 Deploying a LAG 8 ...
Страница 418: ...346 BigIron RX Series Configuration Guide 53 1001810 01 SuperSpan 12 ...
Страница 482: ...410 BigIron RX Series Configuration Guide 53 1001810 01 MRP CLI example 14 ...
Страница 506: ...434 BigIron RX Series Configuration Guide 53 1001810 01 Displaying VSRP information 15 ...
Страница 566: ...494 BigIron RX Series Configuration Guide 53 1001810 01 QoS for the oversubscribed 16 x 10GE modules 18 ...
Страница 582: ...510 BigIron RX Series Configuration Guide 53 1001810 01 Viewing Layer 2 ACLs 20 ...
Страница 634: ...562 BigIron RX Series Configuration Guide 53 1001810 01 Troubleshooting ACLs 21 ...
Страница 642: ...570 BigIron RX Series Configuration Guide 53 1001810 01 Trunk formation 22 ...
Страница 746: ...674 BigIron RX Series Configuration Guide 53 1001810 01 Displaying RIP filters 24 ...
Страница 808: ...736 BigIron RX Series Configuration Guide 53 1001810 01 Displaying OSPF information 25 ...
Страница 926: ...854 BigIron RX Series Configuration Guide 53 1001810 01 Generalized TTL security mechanism support 26 ...
Страница 938: ...866 BigIron RX Series Configuration Guide 53 1001810 01 Displaying MBGP information 27 ...
Страница 950: ...878 BigIron RX Series Configuration Guide 53 1001810 01 Using secure copy 28 ...
Страница 988: ...916 BigIron RX Series Configuration Guide 53 1001810 01 Clearing IS IS information 29 ...
Страница 998: ...926 BigIron RX Series Configuration Guide 53 1001810 01 Configuring BFD for the specified protocol 30 ...
Страница 1014: ...942 BigIron RX Series Configuration Guide 53 1001810 01 Displaying multi device port authentication information 31 ...
Страница 1054: ...982 BigIron RX Series Configuration Guide 53 1001810 01 Sample 802 1x configurations 33 ...
Страница 1072: ...1000 BigIron RX Series Configuration Guide 53 1001810 01 IP source guard 35 Syntax show ip source guard ethernet port num ...
Страница 1108: ...1036 BigIron RX Series Configuration Guide 53 1001810 01 sFlow 39 ...
Страница 1190: ...1118 BigIron RX Series Configuration Guide 53 1001810 01 Displaying RIPng information 44 ...
Страница 1270: ...1198 BigIron RX Series Configuration Guide 53 1001810 01 Displaying ACLs 47 ...
Страница 1310: ...1238 BigIron RX Series Configuration Guide 53 1001810 01 Displaying OSPFv3 information 48 ...
Страница 1382: ...1310 BigIron RX Series Configuration Guide 53 1001810 01 Commands That Require a Reload D ...
Страница 1435: ...BigIron RX Series Configuration Guide 1363 53 1001810 01 VSRP E ...
Страница 1436: ...1364 BigIron RX Series Configuration Guide 53 1001810 01 VSRP E ...