Cisco ASR 5000 Series, Обзор продукта

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ASR 5000 Hardware Platform Overview
ASR 5000 Line Cards ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
The XGLC is a full-height line card, unlike the other line cards, which are half height. To install an XGLC, you must
remove the half-height card guide in the rear of the chassis. Once installed, use only the upper slot number to refer to or
configure the XGLC. Software refers to the XGLC by the top slot number and port; for example, 17/1, not 33/1. For
half-height cards that are installed with the XGLCs, the half-height slot numbering scheme is maintained.
The one-port XGLC supports the IEEE 802.3-2005 revision which defines full duplex operation of 10 Gigabit Ethernet.
When combined with a PSC or PPC, the XGLC supports a maximum sustained forwarding rate of 2.8 Gbps and can
support bursts up to full line rate. When combined with a PSC2, the XGLC supports a maximum sustained forwarding
rate of 6 Gbps, and can support bursts up to full line rate. The XGLC supports a maximum Ethernet Frame size of
3.5KB.
The XGLC use a Small Form Factor Pluggable (SFP+) module. The modules support one of two media types:
10GBASE-SR (Short Reach) 850nm, 300m over Multimode (MMF), or 10GBASE-LR (Long Reach) 1310nm, 10km
over Single Mode (SMF).
The XGLC is configured and monitored via the System Management Card (SMC) over the system‘s control bus. Both
SMCs must be installed to maintain maximum forwarding rates. A feature of the higher speed line cards (10 Gigabit
Ethernet Line Card or XGLC, and the Quad Gigabit Ethernet Line Card or QGLC), is the ability to use the Star Channel
if the firmware needs to be upgraded. The Star Channel is a 2x140Gbps redundancy bus between the packet processing
card and the line card that allows a faster download. Another way to perform a firmware upgrade is via the System
Management Bus, with 1 Mbps throughput, which connects the SMC to every card in the system.
Install XGLCs in chassis slots 17 through 23 and 26 through 32. These cards should always be installed directly behind
their respective packet processing cards, but they are not required behind any redundant packet processing cards (those
operating in Standby mode).
The supported redundancy schemes for XGLC are L3, Equal Cost Multi Path (ECMP) and 1:1 side-by-side redundancy.
Refer to the ―Line Card Installation‖ chapter for additional information.
Power Estimate: 30W maximum
Side by Side Redundancy in the CLI
Side by side redundancy allows two XGLC cards installed in neighboring slots to act as a redundant pair. Side by side
pair slots are 17-18, 19-20, 21-22, 23-26, 27-28, 29-30, and 31-32.
Side by side redundancy only works with XGLC cards. When configured for non-XGLC cards, the cards are brought
offline. If the XGLCs are not configured for side by side redundancy, they run independently without redundancy.
When you first configure side by side redundancy, the higher-numbered slot‘s configuration is erased and then
duplicated from the lower-numbered slot. The lower-numbered top slot retains all other configuration settings. While
side by side redundancy is configured, all other configuration commands work as if the side by side slots were top-
bottom slots. Configuration commands directed at the bottom slots either fail with errors or are disallowed.
When you unconfigure side by side redundancy, the configuration for the higher-numbered top and bottom slots are
initialized to the defaults. The configuration for the lower-numbered stop slot retains all other configuration settings. If
you install non-XGLC cards in the slots, you may bring them back online.
Table 18. SFP Modules Supported by the XGLC
Module Type Card
Identification Interface Type Cable Specifications