Supported Platforms
CoS Features and Limitations on PTX Series Packet Transport Routers
Table 1 summarizes CoS features and limitations on PTX Series Packet Transport Routers.
Table 1: CoS Features and Limitations on PTX Series Routers
CoS Feature | Capacity | Comments |
|---|---|---|
| Classifiers | ||
Maximum number per PFE | 64 | L2 classifiers (sum of ieee-802.1 + ieee-802.1ad cannot exceed 32) DSCP and inet-precedence classifiers (sum of dscp + inet-precedence classifiers cannot exceed 32) dscp-ipv6 classifiers exp classifiers |
dscp | Yes | DSCP and IP precedence classifiers cannot be configured on the same logical interface. |
dscp-ipv6 | Yes | Separate classifiers can be applied for IPv4 and IPv6 packets per logical interface. |
ieee-802.1p | Yes | You can associate ieee-802.1p with any other type of classifier on the same logical interface. For L3 packets, an L3 classifier takes precedence over an IEEE classifier. |
inet-precedence | Yes | |
mpls-exp | Yes | |
Loss priorities based on the Frame Relay discard eligible (DE) bit | No | |
| Drop Profiles | ||
Maximum number | 32 | You can configure up to 32 drop profiles in the PTX chassis. |
Per queue | Yes | |
Per loss priority | Yes | |
Per Transmission Control Protocol (TCP) bit | No | |
| Policing | ||
Traffic policing | Yes | |
Two-rate tricolor marking (TCM) | Yes | |
| Queuing | ||
Priority | Yes (4) | |
Per-queue output statistics | Yes | Red-dropped counters are not maintained per drop precedence. Also tail drop counters always show zero because packets are always dropped by the RED algorithm. |
| Rewrite Markers | ||
Maximum number per PFE | 64 | The sum of L2 and L3 rewrite rules cannot exceed 64. |
dscp | Yes | |
dscp-ipv6 | Yes | |
ieee-802.1 | Yes | L2 and L3 rewrites can be applied to the same packet simultaneously. |
inet-precedence | No | |
mpls-exp | Yes | |
