Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Navigation
Guide That Contains This Content
[+] Expand All
[-] Collapse All

    Aggregated Tethered Services Interfaces Overview

    Aggregated tethered services (ATS) interfaces are similar to aggregated Ethernet interfaces; however, ATS interfaces do not support Link Aggregation Control Protocol (LACP). ATS interfaces enable load balancing across links pointing to the same service card on the CSE2000. In other words, even when one of the tethered links between the PTX5000 or PTX3000 and the CSE2000 service card is down, sampled traffic from PTX Series router to the CSE2000 and the v9 records from the CSE2000 to the PTX Series router continues to flow through the other link, which is up.

    When you connect a PTX Series router router to a CSE2000, two ATS interfaces (ats0 and ats1) are created. The interfaces of the PTX Series router that connect to a CSE2000 are configured as the member interfaces of the ATS interfaces. Doing so associates the physical links of the router with the logical bundle of the ATS interfaces. You must also specify the constituent physical links by including the 802.3ad statement. All the configurations are performed on the PTX Series router.

    Figure 1: ATS Interfaces Between PTX Series Router and CSE2000

    ATS Interfaces Between PTX Series
Router and CSE2000

    Figure 1 shows the ATS interfaces between a PTX Series router and a CSE2000. The CSE2000 has two service cards (ESC0 and ESC1). For the data plane, the interfaces associated with these cards are represented by a logical interface atsinterface-number (where interface-number = 0 or 1). If the service card ESC0 is connected to the PTX Series router, then you use the interface ats0 to represent the service card, whereas if the service card ESC1 is connected, then you use the interface ats1.

    The CSE2000 service card logically occupies the last slot on the router chassis. In the PTX5000 chassis with eight slots, numbered 0 through 7, the CSE2000 service card occupies slot 8. If the ats0 interface is configured and connected, the external service ports (ESPs) on the CSE2000 are represented as esp-8/0/0 and esp-8/0/1. If the ats1 interface is configured, the ESPs are represented as esp-8/1/0 and esp-8/1/1. Similarly, the PTX3000 chassis has 16 slots, numbered 0 through 15. The CSE2000 service card occupies slot 16. If the ats0 interface is configured and connected, the external service ports (ESPs) on the CSE2000 are represented as esp-16/0/0 and esp-16/0/1. If the ats1 interface is configured, the ESPs are represented as esp-16/1/0 and esp-16/1/1.

    Properties of ATS Interfaces

    An ATS interface has the following properties:

    • An ATS interface is a point-to-point Interface.
    • On the ATS interface, you can configure families inet, inet6 and mpls.
    • The maximum transmission unit (MTU) size supported for an ATS interface is 9192 bytes.
    • The local MAC address of the ATS interface is assigned from the global MAC pool similar to those assigned for aggregated interfaces.
    • A maximum of two 10-Gbps Ethernet member interfaces can be configured. These two interfaces must be present on the same FPC in the router that is tethered to the CSE2000.
    • LACP is not supported on the ATS interface.
    • At least one active member interface is needed for ATS to be active.
    • Destination MAC (DMAC) filtering and source MAC (SMAC) filtering are not supported on the ATS interface.
    • The ats0 interface represents the service card ESC0, whereas the ats1 interface represents the service card ESC1.
    • Member interfaces inherit the properties of the ATS interface similar to the way member interfaces inherit the properties of aggregated Ethernet interfaces.
    • If an interface is added as part of the ATS interface, then it cannot be configured separately.
    • You must not configure any protocol on the ATS interface.

    Modified: 2017-01-18