Cisco Cisco Packet Data Interworking Function (PDIF)
Engineering Rules
▀ Context Rules
▄ ASR 5000 System Administration Guide, StarOS Release 16
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Context Rules
A maximum of 63 contexts may be configured per chassis.
Interfaces per Context
512 Ethernet+PPP+tunnel interfaces
32 ipv6ip tunnel interfaces
511 GRE tunnels (2,048 GRE tunnels per chassis)
256 loopback interfaces
IP Addresses and IP Address Pools
Up to 2,000 IPv4 address pools can be configured within a single context (regardless of the number of
packet processing cards) with a total system limit of 5,000 IPv4 address pools for all contexts.
Prior to Release 15.0: Up to 32 IPv6 pools can be configured within a single context.
For Release 15.0 and higher: Up to 256 IPv6 pools can be configured within a single context.
There is also a limit of 4,000,000 pool addresses and 32,000,000 static addresses that can be configured
per context. Therefore, the number of pools depends on how many addresses are being used and how
they are subnetted.
they are subnetted.
Each context supports up to 32,000,000 static IP pool addresses. You can configure a maximum total of
96,000,000 static IP pool addresses per chassis. Each static IP pool can contain up to 500,000
addresses.
addresses.
Each context supports up to 16,000,000 dynamic IP pool addresses. You can configure a maximum
total of 32,000,000 dynamic IP pool addresses per chassis. Each dynamic IP pool can contain up to
500,000 addresses.
500,000 addresses.
Important:
Each address in the pool requires approximately 60 bytes of memory. The amount
of memory required, however, depends on a number of factors such as the pool type, and hold-timer
usage. Therefore, in order to conserve available memory, you may need to limit the number of pools
depending on the number of addresses to be configured and the number of installed application cards.
usage. Therefore, in order to conserve available memory, you may need to limit the number of pools
depending on the number of addresses to be configured and the number of installed application cards.
The maximum number of simultaneous subscriber sessions is controlled by the installed capacity license for the
service(s) supported.
The maximum number of static address resolution protocol (ARP) entries per context is 128.
The maximum number of domains per context is 2,048.
ASN-GW services configured within the same context cannot communicate with each other.
Routes
Up to 1,200 static routes per context (48,000 per chassis).
6,000 pool routes per context (6,000 per chassis)
5,000 pool explicit host routes per context (6,000 per chassis)
64 route maps per context