ASR LC Trident
Table of Contents
Introduction
Trident is the first generation of Ethernet line cards for the ASR 9000 routers.
Trident
- First generation of line cards.
- Referred to as Ethernet Line Cards (vs Enhanced Ethernet Line Cards for Typhoon).
- Has three different types. All of these have the same feature set, but different scaling options:
- L -Low Queue (queues: 8 per port) (policers: 8000) (Ethernet flow points EFPs: 4000)
- B - Base (Medium) Queue (queues: 96K - 192K) (policers: 64K - 128K) (Ethernet flow points EFPs: 16K)
- E - Extended (High) Queue (queues: 376K - 512K) (policers: 256K - 512K) (Ethernet flow points EFPs: 32K)
Architecture
- PHY - stands for the physical layer of the interfaces. Performs functions such as:
- framing
- CRC
- speeds: 1GE, 10GE
- form factors: SFP, XFP
- media/reach: T, SR, LR, ZR, LR4
- colors: gray, CWDM, DWDM, Tunable
- NP - stand for the Network Processor. The NP is used for forwarding and all feature such as:
- FIB, MAC, ACL, QoS, encap/decap, LPTS, all hardware features, buffer and i/f stats.
- L2 &L3 forwarding.
- control plane policing.
- FIA - stand for Fabric Interface ASIC.
- FIA is the interface to the backplane switching fabric.
- This is where the Virtual Output Queues (VOQs) reside.
- 2PQ + 1BE per egress 10G port. 2 priority queues. 1 best effort
- Different VOQ are generated for different egress port to prevent head of line blocking.
- EOBC - stand for Ethernet out-of-band channel.
- Connects the LC' CPU to the NP and FIA and the RP's CPU.
- This is an internal 1G switch used for control plane packets.
- Local Packet Transport Service (LPTS) runs over EOBC for internal communication to the the RP's CPU.
- LC CPU
- Program HW forwarding tables.
- Software switch packets.
- Netflow.
- Bridge (FPGA)
- Provides connection between the NP and FIA.
Models
A9K-40GE
- 40 port GE (SFP)
- A9K-40GE-L
- A9K-40GE-B
- A9K-40GE-E
- Below you can see the mapping of port to the NP for line card 0/7/CPU0.
- The show controller np ports all can be used to find the NP port mapping.
A9K-4T
- 4 port 10 GE (XFPs)
- A9K-4T-L
- A9K-4T-B
- A9K-4T-E
A9K-8T/4
- 8 port 10 GE (XFPs)
- A9K-8T/4-L
- A9K-8T/4-B
- A9K-8T/4-E
A9K-2T20GE
- 2 port 10 GE (XFPs), 20 port GE (SFPs)
- A9K-2T20GE-L
- A9K-2T20GE-B
- A9K-2T20GE-E
A9K-8T
- 8 port 10 GE (XFPs)
- A9K-8T-L
- A9K-8T-B
- A9K-8T-E
A9K-16/8T
- 16 port 10 GE (XFPs)
- A9K-16/8T-B
Relevant Commands
show controllers np ports all location
Show the mapping for the port to NP and bridge.
RP/0/RSP0/CPU0:r01# show controllers np ports all location (LC CPU)
Additional Resources
ASR9000/XR Understanding Route scale
Cisco ASR 9000 Transceiver Modules: Line Card Support - Cisco