---
title: "Guidelines for Setting Up Performance Sessions"
slug: "guidelines-for-setting-up-performance-sessions"
tags: ["session types", "Session Management", "Sessions Management", "Performance Sessions", "Legacy Orchestrator"]
updated: 2026-06-01T18:42:04Z
published: 2026-06-01T18:42:04Z
canonical: "docs.crossworkassurance.cisco.com/guidelines-for-setting-up-performance-sessions"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crossworkassurance.cisco.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Guidelines for Setting Up Performance Sessions

This section contains information intended to help you when you are setting up a performance session.

## Uses and Applicability of Session Types

The following table provides guidelines on when to use each type of session.

| Session Type | Uses and Applicability |
| --- | --- |
| Echo | Use Echo sessions as an alternative to TWAMP, if TWAMP reflectors are not available: - Use Echo UDP if you have reflectors that can reflect UDP packets. - Use Echo ICMP if your reflector does not reflect UDP but can reflect ICMP pings. - Echo UDP and Echo ICMP sessions only provide two-way statistics. - IPv4 and IPv6 for sessions on Crosswork Assurance Sensor Control - IPv4 and IPv6 for NFV sessions on Assurance Sensor Control - Supported by Crosswork Assurance. - Supported by SLA portal. |
| Ethernet OAM | - Use Ethernet OAM sessions for Layer-2 measurements. - Use ETH-DM with third-party responders that can reflect DMM messages: - ETH-DM has advantage over ETH-LB in that it provides one-way latency measurements. - Also provides round-trip packet loss metrics. - Supported by Crosswork Assurance. - Supported by SLA portal. - Use ETH-LB with third-party responders that can reflect LBM messages: - Use ETH-VS with Assurance Sensors: |
| TWAMP | - Use TWAMP to obtain one-way statistics when the reflector is capable of Layer-3 TWAMP reflection. - IP addressing support: |
| 2xOneWay | - Use for Assurance Sensor Control to Assurance Sensor Control sessions to obtain one-way statistics on Layer 3. - IPv4 addressing only. - Advantages over TWAMP: - Supported by SLA portal. |

## Ports and Protocols per Session Type

The following table indicates the encapsulation supported for each session type and the ports that are typically used for each.

| Session Type | Protocol / Encapsulation | Sender Port | Reflector Port |
| --- | --- | --- | --- |
| Echo | ICMP | Not applicable | Not applicable |
| Echo | UDP | 13000 | 7 |
| Ethernet OAM | Not applicable (Layer 2) | Not applicable (Layer 2) | Not applicable (Layer 2) |
| TWAMP | TWAMP-Test / UDP TWAMP-Control / TCP | 14000 862 | 4000 862 |
| 2xOneWay | GRE ICMP RTP SCTP / TCP / UDP | Not applicable Not applicable 3000 5000 | Not applicable Not applicable 3000 5000 |

---

***Note:** If multiple TWAMP sessions are set up between the same sender and the same reflector, a separate connection must be set up for each session. This can be done by selecting a different interface or a different port number on the sender or reflector.*

---

## Sender and Reflector Capabilities of Accedian Devices

The following tables summarize the send and reflect capabilities of various Accedian devices. You can use these tables to help you select appropriate devices as the sender and reflector when you are setting up sessions.

**Session Types Supported for Accedian Devices** Legend: **YES** = supported; **no** = not supported

#### Crosswork Assurance Sensor Control

| Session Type | Send | Reflect |
| --- | --- | --- |
| 2xOneWay | YES | YES |
| ICMP Echo | YES | YES |
| UDP Echo | YES | YES |
| Ethernet OAM ETH-DM | YES | YES |
| Ethernet OAM ETH-LB | YES | YES |
| Ethernet OAM ETH-VS | YES | YES |
| TWAMP | YES | YES ***Note:** TWAMP state-full reflection only.* |

#### Crosswork Assurance Sensors LT, LX, and GT

| Session Type | Send | Reflect |
| --- | --- | --- |
| 2xOneWay | NO | NO |
| ICMP Echo | NO | YES |
| UDP Echo | NO | YES |
| Ethernet OAM ETH-DM | NO | YES |
| Ethernet OAM ETH-LB | NO | YES |
| Ethernet OAM ETH-VS | NO | YES |
| TWAMP | NO | YES |

#### Crosswork Assurance Sensors F100 and F25

| Session Type | Send | Reflect |
| --- | --- | --- |
| 2xOneWay | NO | NO |
| ICMP Echo | NO | NO |
| UDP Echo | NO | NO |
| Ethernet OAM ETH-DM | NO | NO |
| Ethernet OAM ETH-LB | NO | NO |
| Ethernet OAM ETH-VS | NO | NO |
| TWAMP | NO | NO |

#### Crosswork Assurance Sensor Modules

| Session Type | Send | Reflect |
| --- | --- | --- |
| 2xOneWay | NO | NO |
| 2xOneWay NFV | NO | NO |
| ICMP Echo | NO | YES ***Note:** Reflection is limited to 1 PPS total.* |
| UDP Echo | NO | YES ***Note:** Reflection requires setting a loopback on the UDP echo port.* |
| ICMP Echo (NFV) | YES | YES |
| UDP Echo (NFV) | YES | YES |
| Ethernet OAM ETH-DM | NO | YES |
| Ethernet OAM ETH-LB | NO | YES |
| Ethernet OAM ETH-VS | NO | NO |
| Ethernet OAM ETH-DM (NFV) | YES | YES |
| Ethernet OAM ETH-LB (NFV) | YES | YES |
| Ethernet OAM ETH-VS (NFV) | YES | NO |
| TWAMP | NO | YES |
| TWAMP (NFV) | YES | YES |

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