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BigIron RX Series Configuration Guide
53-1001810-01
Changing the IPv6 MTU
43
NOTE
For the interval at which a router interface sends router advertisement messages,
Brocade
uses
seconds as the unit of measure instead of milliseconds.
Brocade
does not recommend configuring a short reachable time duration, because a short
duration causes the IPv6 network devices to process the information at a greater frequency.
For example, to configure the reachable time of 40 seconds for Ethernet interface 3/1, enter the
following commands.
BigIron RX(config)# interface ethernet 3/1
BigIron RX(config-if-e100-3/1)# ipv6 nd reachable-time 40
Syntax: [no] ipv6 nd reachable-time <
seconds
>
For the <
seconds
> parameter, you can specify any numerical value. To restore the default time, use
the no form of this command.
Changing the IPv6 MTU
The IPv6 MTU is the maximum length of an IPv6 packet that can be transmitted on a particular
interface. If an IPv6 packet is longer than an MTU, the host that originated the packet fragments
the packet and transmits its contents in multiple packets that are shorter than the configured MTU.
You can configure the MTU on individual interfaces. Per RFC 2460, the minimum IPv6 MTU for any
interface is 1280 bytes.
For example, to configure the MTU on Ethernet interface 3/1 as 1280 bytes, enter the following
commands.
BigIron RX(config)# interface ethernet 3/1
BigIron RX(config-if-e100-3/1)# ipv6 mtu 1280
Syntax: [no] ipv6 mtu <
bytes
>
You can specify between 1280 – 1500 bytes. If a nondefault value is configured for an interface,
router advertisements include an MTU option.
You can configure IPv6 MTU for to be greater than 1500 bytes, although the default remains at
1500 bytes. The value of the MTU you can define depends on the following:
•
For a physical port, the maximum value of the MTU is the equal to the maximum frame size of
the port minus 18 (Layer 2 MAC CRC).
•
For a virtual routing interface, the maximum value of the MTU is the maximum frame size
configured for the VLAN to which it is associated, minus 18 (Layer 2 MAC CRC). If a
maximum frame size for a VLAN is not configured, then configure the MTU based on the
smallest maximum frame size of all the ports of the VLAN that corresponds to the virtual
routing interface, minus 18 (Layer 2 MAC CRC).
To define IPv6 MTU globally, enter the following command.
BigIron RX(config)#ipv6 mtu 1300
To define IPv6 MTU on an interface, enter the following command:
BigIron RX(config-if-e1000-2/1)#ipv6 mtu
Syntax: ipv6 mtu <
value
>
Summary of Contents for Brocade DCX
Page 40: ...xl BigIron RX Series Configuration Guide 53 1001810 01 ...
Page 72: ...lxxii BigIron RX Series Configuration Guide 53 1001810 01 ...
Page 88: ...16 BigIron RX Series Configuration Guide 53 1001810 01 Searching and filtering output 1 ...
Page 300: ...228 BigIron RX Series Configuration Guide 53 1001810 01 Displaying IP information 7 ...
Page 318: ...246 BigIron RX Series Configuration Guide 53 1001810 01 Deploying a LAG 8 ...
Page 418: ...346 BigIron RX Series Configuration Guide 53 1001810 01 SuperSpan 12 ...
Page 482: ...410 BigIron RX Series Configuration Guide 53 1001810 01 MRP CLI example 14 ...
Page 506: ...434 BigIron RX Series Configuration Guide 53 1001810 01 Displaying VSRP information 15 ...
Page 582: ...510 BigIron RX Series Configuration Guide 53 1001810 01 Viewing Layer 2 ACLs 20 ...
Page 634: ...562 BigIron RX Series Configuration Guide 53 1001810 01 Troubleshooting ACLs 21 ...
Page 642: ...570 BigIron RX Series Configuration Guide 53 1001810 01 Trunk formation 22 ...
Page 746: ...674 BigIron RX Series Configuration Guide 53 1001810 01 Displaying RIP filters 24 ...
Page 808: ...736 BigIron RX Series Configuration Guide 53 1001810 01 Displaying OSPF information 25 ...
Page 938: ...866 BigIron RX Series Configuration Guide 53 1001810 01 Displaying MBGP information 27 ...
Page 950: ...878 BigIron RX Series Configuration Guide 53 1001810 01 Using secure copy 28 ...
Page 988: ...916 BigIron RX Series Configuration Guide 53 1001810 01 Clearing IS IS information 29 ...
Page 1054: ...982 BigIron RX Series Configuration Guide 53 1001810 01 Sample 802 1x configurations 33 ...
Page 1108: ...1036 BigIron RX Series Configuration Guide 53 1001810 01 sFlow 39 ...
Page 1190: ...1118 BigIron RX Series Configuration Guide 53 1001810 01 Displaying RIPng information 44 ...
Page 1270: ...1198 BigIron RX Series Configuration Guide 53 1001810 01 Displaying ACLs 47 ...
Page 1310: ...1238 BigIron RX Series Configuration Guide 53 1001810 01 Displaying OSPFv3 information 48 ...
Page 1382: ...1310 BigIron RX Series Configuration Guide 53 1001810 01 Commands That Require a Reload D ...
Page 1435: ...BigIron RX Series Configuration Guide 1363 53 1001810 01 VSRP E ...
Page 1436: ...1364 BigIron RX Series Configuration Guide 53 1001810 01 VSRP E ...