6.4.8. Permit(IPv6)

Syntax

[sequence <1-2147483647>] permit (<0-255> | ipv6) (X:X::X:X / <0-128> | any) (X:X::X:X / <0-128> | any)[(dscp | precedence) VALUE]

[sequence <1-2147483647>] permit icmp (X:X::X:X / <0-128> | any)( X:X::X:X / <0-128> | any) (<0-255> | destination-unreachable|packet-too-big|time-exceeded | parameter-problem|echo-request|echo-reply | mld-query | mld-report | mldv2-report|mld-done | router-solicitation | router-advertisement | nd-ns | nd-na | any) (<0-255> | any)[( dscp | precedence) VALUE]

[sequence <1-2147483647>] permit tcp (X:X::X:X / <0-128> | any) (<0-65535> | echo | discard | daytime | ftp-data | ftp | telnet | smtp | time | hostname | whois | tacacs-ds | domain | www | pop2 | pop3 | syslog | talk | klogin | kshell | sunrpc | drip | PORT_RANGE | any) (X:X::X:X / <0-128> | any) (<0-65535> | echo | discard | daytime | ftp-data | ftp | telnet | smtp | time | hostname | whois | tacacs-ds | domain | www | pop2 | pop3 | syslog | talk | klogin | kshell | sunrpc | drip | PORT_RANGE | any) [match-all TCP_FLAG] [(dscp | precedence) VALUE]

[sequence <1-2147483647>] permit udp (X:X::X:X / <0-128> | any)(<0-65535> | echo | discard | time | nameserver | tacacs-ds | domain | bootps | bootpc | tftp | sunrpc | ntp | netbios-ns | snmp | snmptrap | who | syslog | talk | rip | PORT_RANGE | any) (X:X::X:X / <0-128> | any) (<0-65535> | echo | discard | time | nameserver | tacacs-ds | domain | bootps | bootpc | tftp | sunrpc | ntp | netbios-ns | snmp | snmptrap | who | syslog | PORT_RANGE | any) [(dscp | precedence) VALUE]

no sequence <1-2147483647>

Parameter

<1-2147483647>

(Optional) Specify sequence index of ACE, the sequence index represent the priority of an ACE in ACL.

(X:X ::X:X/<0-1 28>|any)

Specify the source IPv6 address and mask of packet or any IPv6 address.

(X:X ::X:X/<0-1 28>|any)

Specify the destination IPv6 address and prefix of packet or any IPv6 address.

[dscp VALUE]

(Optional) Specify the DSCP of packet.

[ precedence VLAUE]

(Optional) Specify the IP precedence of packet.

i cmp-type

Specify ICMP message type for filtering ICMP packet. Enter a type name of list or a number of ICMP message type.

i cmp-code

Specify ICMP message code for filtering ICMP packet.

l4-source-port

Specify TCP/UDP destination port of for filtering TCP/UDP packet. Enter a port name of list or a number of TCP/UDP port.

l4-destination-port

Specify TCP/UDP destination port of for filtering TCP/UDP packet. Enter a port name of list or a number of TCP/UDP port.

match-all

Specify tcp flag for TCP packet. If a flag should be set it is prefixed by”+”.If a flag should be unset it is prefixed by “-”. Available options are +urg, +ack, +psh, +rst, +syn, +fin,-urg, -ack, -psh, -rst, -syn and -fin.To define more than 1 flag - enter additional flags one after another without a space (example +syn-ack).

Default

No default is defined.

Mode

IPv6 ACL Configuration

Usage

Use the permit command to add permit conditions for an IPv6 ACE that bypasses those packets hit the ACE. The “sequence” also represents hit priority when ACL bind to an interface. An ACE not specifies “sequence” index would assign a sequence index which is the largest existed index plus 20. If packet content can match more than one ACE, the lowest sequence ACE is hit. An ACE can not be added if has the same conditions as existed ACE.

Example

The example shows how to add a set of ACEs. You can verify settings by the following show acl command. This command shows how to permit a source IP address subnet.

Switch(ipv6-al)# permit permit ipv6 fe80:1122:3344:5566::1/64 any
Switch(ipv6-al)# show acl
IPv6 access list ipv6test
sequence 1 permit ipv6 fe80:1122:3344:5566::1/64 any