uda-offsets
Specifies the user-defined ACL (UDA) offsets for a UDA profile.
Syntax
uda-offsets
{
[
offset-base-1
]
[
negative
]
{
offset-1
|
ignore
}
}
{
[
offset-base-2
]
[
negative
]
{
offset-2
|
ignore
}
}
{
[
offset-base-3
]
[
negative
]
{
offset-3
|
ignore
}
}
{
[
offset-base-4
]
[
negative
]
{
offset-4
|
ignore
}
}
no uda-offsets
{
[
offset-base-1
]
[
negative
]
{
offset-1
|
ignore
}
}
{
[
offset-base-2
]
[
negative
]
{
offset-2
|
ignore
}
}
{
[
offset-base-3
]
[
negative
]
{
offset-3
|
ignore
}
}
{
[
offset-base-4
]
[
negative
]
{
offset-4
|
ignore
}
}
Command Default
UDA offsets are not defined.
Parameters
- offset-base-1,
offset-base-2,
offset-base-3,
offset-base-4
- Specifies an offset base. The options are as follows:
- packet-start
- (Default) The offset base is the start of
the packet. This option is applicable to specify a field within
63 bytes of the start of the packet.
- first-header
- The offset base is the first parsed header
after Ethernet. For example, in the following header, first-header points to
MPLS:
<MAC><VLAN><MPLS><IPV6><UDP><SIP>
- second-header
- The offset base is the second parsed header
after Ethernet. For example, in the following header,
second-header points to
IPv6:
<MAC><VLAN><MPLS><IPV6><UDP><SIP>
- third-header
- The offset base is the third parsed header
after Ethernet. For example, in the following header,
third-header points to
UDP:
<MAC><VLAN><MPLS><IPV6><UDP><SIP>
- fourth-header
- The offset base is the fourth parsed header
after Ethernet. For example, in the following header,
fourth-header points to
SIP.
<MAC><VLAN><MPLS><IPV6><UDP><SIP>
- negative
- Specifies a negative offset. If you do not
specify this optional keyword, the offset is positive.
- offset-1,
offset-2,
offset-3.
offset-4
- Specifies the offset. Valid values are from 1 through 63.
- ignore
- Configures ignoring this offset.
Modes
UDA-profile configuration mode
Usage Guidelines
For any of the four offsets not defined, you need to specify
ignore.
To delete UDA-profile offsets, use the
no form of this command. If you need to change the offset values, you first need to delete the current values.
Examples
The following example creates a UDA profile and then defines offsets from the packet start.
device# configure terminal
device(config)# uda-key profile uda-prof_01
device(config-uda-key)# uda-offsets 0 4 8 12
The following example uses the second header (UDP) as the offset base and specifies 49 as the offset.
device# configure terminal
device(config)# uda-key profile uda-prof_02
device(config-uda-key)# uda-offsets second-header 49 ignore ignore ignore
