Configuring IP Equal-Cost Multipath

Chapter 6 Configuring the Internet Protocol

To set the equal-cost multipath (ECMP) selection algorithm and the preferred reverse egress path, use the ip ecmp command. The CSS supports a maximum of 15 ECMP paths.

The syntax for this global configuration command is:

ip ecmp [addressno-prefer-ingressroundrobin]

The options for this global configuration mode command are as follows:

•address - Choose among alternate paths based on IP addresses. For example:

(config)# ip ecmp address

•no-prefer-ingress- Do not prefer the ingress path of a flow for its reverse egress path. By default, the ingress path for a flow is the preferred egress path. This means that the preferred interface over which to reply to a client is the interface on which the CSS originally received the request from the client. Note that this command option has no effect on UDP traffic.

For example:

(config)# ip ecmp no-prefer-ingress

To reset the ingress path of a flow for its preferred reverse egress path, enter:

(config)# no ip ecmp no-prefer-ingress

•roundrobin - Alternate between equal paths in roundrobin fashion. For example:

(config)# ip ecmp roundrobin

Note The CSS applies the ECMP selection algorithm for non-TCP/UDP packets (for example, ICMP) on a packet-by-packet basis. Multipath selection for TCP and UDP is performed on a per-flow basis, and all packets for a particular flow take the same path.

	Cisco Content Services Switch Routing and Bridging Configuration Guide

OL-8241-02		6-9
OL-8241-02		6-9

OL-8241-02 specifications

Cisco Systems OL-8241-02 is a significant component of Cisco's extensive portfolio, catering specifically to the needs of enterprise-level networking. This module is designed to provide advanced routing capabilities, aiding organizations in achieving robust connectivity and efficient data transmission across their networks. It is particularly popular among businesses that require reliable performance and scalability.

One of the main features of the OL-8241-02 module is its support for multiple protocols, including OSPF, EIGRP, and BGP, which allows for seamless integration into various network configurations. This flexibility ensures that organizations can adapt to evolving networking demands without undergoing complete infrastructure overhauls. Furthermore, the module includes advanced security features, such as IPsec VPN support and integrated firewall capabilities, enhancing overall network security and protecting sensitive data from potential threats.

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The OL-8241-02 also incorporates cutting-edge technologies like Quality of Service (QoS), which prioritizes network traffic based on application requirements. This feature is essential for ensuring that critical applications receive the bandwidth they need, while less critical tasks can be deprioritized during peak usage times. Additionally, the module supports IPv6, which is vital for organizations looking to future-proof their network infrastructure amid the global transition from IPv4.

The ease of management is another highlight of the OL-8241-02, with user-friendly interfaces and compatibility with Cisco's robust management software. This capability allows IT teams to monitor performance metrics, troubleshoot issues, and configure settings with minimal complexity.

In summary, the Cisco Systems OL-8241-02 module stands out for its versatility, performance, and security features. Equipped with the ability to support various protocols, advanced security measures, and efficient traffic management, it proves to be a reliable choice for enterprises aiming to enhance their networking capabilities and ensure seamless operational continuity.

Cisco Systems OL-8241-02 Configuring IP Equal-Cost Multipath, Config# ip ecmp no-prefer-ingress

Models: OL-8241-02