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Scope of Logical System Administration
Logical system administrators are confined to the context of
the logical systems to which they are assigned. Any global configuration
statements are restricted from them, and command output is restricted
to the context to which the logical system administrators are assigned.
For JUNOS software Release 9.1 and later, when a physical interface
is specified within a logical system context, the show interfaces command output only displays information about the logical interfaces
assigned to that logical system.
From within the context of a logical system (which you can select
from the main router context by using the set cli logical-systems logical-system-name command), the show interfaces command output is limited to the resources assigned to the logical
system:
- The physical interfaces are listed by name, but no statistics
are displayed.
- Only the logical interfaces assigned to the logical system
are listed, with statistics displayed.
- None of the special, system-generated logical interfaces
with logical unit number 32767 are listed.
At the main router level (to which you can return from the logical
system context by using the clear cli logical system command),
the show interfaces command output displays statistics for
all interfaces configured on the router:
- Statistics are displayed for all physical interfaces.
- Statistics are displayed for all logical interfaces.
- Statistics are displayed for all system-generated logical
interfaces with logical unit number 32767.
Example: show interfaces terse
Consider a main router for which you have configured the physical
interface at-0/0/0 with ATM-specific physical interface properties
and configured the physical interface with a logical interface at
logical unit 0. You have also configured logical system ls1 and assigned a logical system administrator for this logical
system. The logical system administrator has assigned the logical
interface at-0/0/0.0 to logical system ls1. The
configuration is as follows:
- logical-systems {
-
- ls1 {
-
- interfaces {
-
- at-0/0/0 {
-
- unit 0 {
- encapsulation atm-ccc-cell-relay;
- vpi 0;
- }
- }
- }
-
- protocols {
-
- mpls {
-
- label-switched-path base_config_r4r1_lsp {
- to 10.255.65.65;
- }
- interface all;
- }
-
- connections {
-
- remote-interface-switch base_config_vp_mode_connection
{
- interface at-0/0/0.0;
- transmit-lsp base_config_r1r4_lsp;
- receive-lsp base_config_r4r1_lsp;
- }
- }
- }
- }
- }
- chassis {
-
- fpc 0 {
-
- pic 0 {
-
- atm-l2circuit-mode {
- cell;
- }
- }
- }
- }
- interfaces {
-
- at-0/0/0 {
-
- atm-options {
- pic-type atm2;
-
- promiscuous-mode {
- vpi 0;
- }
- }
-
- inactive: unit 0 {
- encapsulation atm-ccc-cell-relay;
- vpi 0;
- }
- }
- }
- protocols {
-
- mpls {
- interface all;
- }
-
- isis {
- disable;
-
- interface all {
- level 1 disable;
- level 2 metric 10;
- }
-
- interface fxp0.0 {
- disable;
- }
- }
-
- ospf {
- reference-bandwidth 4g;
-
- area 0.0.0.0 {
- interface all;
-
- interface fxp0.0 {
- disable;
- }
- }
- }
- }
Within the context of a logical system, logical system administration
is confined to the resources assigned to that logical system.
- The following example shows the output of the show
interfaces terse command when you (as the master administrator)
issue the command from the context of the main router:
user@host> show interfaces terse at-0/0/0
Interface Admin Link Proto Local Remote
at-0/0/0 up up
at-0/0/0.0 up up ccc
at-0/0/0.32767 up up
The physical interface name at-0/0/0 is reported, followed
by all requested information (in the case of the show interfaces
terse command, the Admin and Link states) about the physical
interface.
The logical interface name at-0/0/0.0 is reported,
followed by all requested information.
The output also displays all requested information about the
special, system-generated logical interface at-0/0/0.32767, which the JUNOS software uses for handling traffic that is not
part of the interface. In the case of the ATM interface at-0/0/0, which is configured for cell-relay promiscuous virtual path identifier
(VPI) mode, the system-generated logical interface at-0/0/0.32767 is used to track statistics associated with system-generated traffic,
such as Operation, Administration, and Management (OAM) F4 cell flows.
 |
Note:
The show interfaces extensive command output displays
the individual channel statistics associated with the special .32767 logical interface, but only when the command is issued
from the context of the main router.
|
- The following example shows how you can place yourself
into the context of logical system ls1:
user@host> set cli logical-system ls1
Logical system: ls1
user@host:lst1>
- The following example shows the output of the show
interfaces terse operational command when you (as the master
administrator) issue it from the context of logical system ls1 or when it is issued by a logical system administrator for the logical
system ls1:
user@host:ls1> show interfaces terse
at-0/0/0
Interface Admin Link Proto Local Remote
at-0/0/0
at-0/0/0.0 up up ccc
The physical interface name at-0/0/0 is reported, but
any additional details about the physical interface (in the case of
the show interfaces terse command, the Admin and Link states)
are not displayed. The system-generated logical interface at-0/0/0.32767 is not reported at all.
- The following example shows how you can move from the
context of the logical system ls1 back to the context of
the main router:
user@host:ls1> clear cli logical-system
Cleared default logical system
user@host>
For more logical system configuration examples, including verification
of proper operation and verification performed by logical system administrators,
see the JUNOS Feature Guide.
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