Cisco Cisco Packet Data Interworking Function (PDIF) Guía Para Resolver Problemas
Engineering Rules
Interface and Port Rules ▀
Cisco ASR 5000 Series System Administration Guide ▄
OL-22969-02
Interface and Port Rules
The rules discussed in this section pertain to the following Ethernet line cards and the type of interfaces they facilitate,
regardless of the application:
regardless of the application:
Fast Ethernet 10/100 (FELC)
Gigabit Ethernet 1000 (GELC)
Quad Gigabit Ethernet (QGLC)
Line Card Rules
The following engineering rules apply to the Fast Ethernet 10/100, Gigabit Ethernet 1000, and Quad Gigabit line cards:
Give all logical interfaces a unique name to identify the interface from others in the same context. Logical
interfaces in different contexts may have the same name.
A single physical port can support multiple logical interfaces when you configure VLAN tags for that physical
port. You can use VLAN tagging to bind a single physical port to multiple logical interfaces that reside in
different contexts.
different contexts.
Assign all logical interfaces a valid IP address and subnet.
Give each logical interface within a context a unique IP address(es). Logical interfaces in different
contexts can have the same IP address(es).
If multi-homing is supported on the network, you can assign all logical interfaces a single primary IP
address and up to 16 secondary IP addresses.
You can configure a logical interface in only one context, but you can configure multiple interfaces (up to 512
Ethernet or 1,024 ATM) in a single context.
You can apply a maximum of 128 ACL rules to a single logical interface.
All ports are identified by their <slot#>/<port#>.
Each physical port on a Gigabit Ethernet 1000 or Quad Gigabit line card may contain up to a maximum of 1024
VLAN tags.
Each physical port on an Fast Ethernet 10/100 Line card may contain up to a maximum of 256 VLAN tags.
The total number of VLANs untagged and/or tagged on each Fast Ethernet 10/100 Line Card must not exceed
1025 (8 untagged + 1017 tagged).
A logical interface is limited to using a single VLAN or ATM PVC on a single physical port, identified by its
<cardslot#/port#>.
When using redundant (standby) line cards: