diff options
Diffstat (limited to 'vnet/vnet/l2/l2_vtr.c')
| -rw-r--r-- | vnet/vnet/l2/l2_vtr.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/vnet/vnet/l2/l2_vtr.c b/vnet/vnet/l2/l2_vtr.c index 3ec8b8a7d36..9cb0a7e9da3 100644 --- a/vnet/vnet/l2/l2_vtr.c +++ b/vnet/vnet/l2/l2_vtr.c @@ -29,6 +29,17 @@ #include <vppinfra/error.h> #include <vlib/cli.h> +/** + * @file + * @brief Ethernet VLAN Tag Rewrite. + * + * VLAN tag rewrite provides the ability to change the VLAN tags on a packet. + * Existing tags can be popped, new tags can be pushed, and existing tags can + * be swapped with new tags. The rewrite feature is attached to a subinterface + * as input and output operations. The input operation is explicitly configured. + * The output operation is the symmetric opposite and is automatically derived + * from the input operation. + */ /** Just a placeholder; ensures file is not eliminated by linker. */ clib_error_t * @@ -532,6 +543,58 @@ done: return error; } +/*? + * VLAN tag rewrite provides the ability to change the VLAN tags on a packet. + * Existing tags can be popped, new tags can be pushed, and existing tags can + * be swapped with new tags. The rewrite feature is attached to a subinterface + * as input and output operations. The input operation is explicitly configured. + * The output operation is the symmetric opposite and is automatically derived + * from the input operation. + * + * <b>POP:</b> For pop operations, the subinterface encapsulation (the vlan + * tags specified when it was created) must have at least the number of popped + * tags. e.g. the \"pop 2\" operation would be rejected on a single-vlan interface. + * The output tag-rewrite operation for pops is to push the specified number of + * vlan tags onto the packet. The pushed tag values are the ones in the + * subinterface encapsulation. + * + * <b>PUSH:</b> For push operations, the ethertype is also specified. The + * output tag-rewrite operation for pushes is to pop the same number of tags + * off the packet. If the packet doesn't have enough tags it is dropped. + * + * + * @cliexpar + * @parblock + * By default a subinterface has no tag-rewrite. To return a subinterface to + * this state use: + * @cliexcmd{set interface l2 tag-rewrite GigabitEthernet0/8/0.200 disable} + * + * To pop vlan tags off packets received from a subinterface, use: + * @cliexcmd{set interface l2 tag-rewrite GigabitEthernet0/8/0.200 pop 1} + * @cliexcmd{set interface l2 tag-rewrite GigabitEthernet0/8/0.200 pop 2} + * + * To push one or two vlan tags onto packets received from an interface, use: + * @cliexcmd{set interface l2 tag-rewrite GigabitEthernet0/8/0.200 push dot1q 100} + * @cliexcmd{set interface l2 tag-rewrite GigabitEthernet0/8/0.200 push dot1ad 100 150} + * + * Tags can also be translated, which is basically a combination of a pop and push. + * @cliexcmd{set interface l2 tag-rewrite GigabitEthernet0/8/0.200 translate 1-1 dot1ad 100} + * @cliexcmd{set interface l2 tag-rewrite GigabitEthernet0/8/0.200 translate 2-2 dot1ad 100 150} + * @cliexcmd{set interface l2 tag-rewrite GigabitEthernet0/8/0.200 translate 1-2 dot1q 100} + * @cliexcmd{set interface l2 tag-rewrite GigabitEthernet0/8/0.200 translate 2-1 dot1q 100 150} + * + * To display the VLAN Tag settings, show the associate bridge-domain: + * @cliexstart{show bridge-domain 200 detail} + * ID Index Learning U-Forwrd UU-Flood Flooding ARP-Term BVI-Intf + * 200 1 on on on on off N/A + * + * Interface Index SHG BVI VLAN-Tag-Rewrite + * GigabitEthernet0/8/0.200 5 0 - trans-1-1 dot1ad 100 + * GigabitEthernet0/9/0.200 4 0 - none + * GigabitEthernet0/a/0.200 6 0 - none + * @cliexend + * @endparblock +?*/ /* *INDENT-OFF* */ VLIB_CLI_COMMAND (int_l2_vtr_cli, static) = { .path = "set interface l2 tag-rewrite", |