user manual
Table Of Contents
- Cisco Content Services Switch Routing and Bridging Configuration Guide
- Contents
- Preface
- Configuring Interfaces and Circuits
- Interface and Circuit Overview
- Configuring Interfaces
- Configuring an Interface
- Entering a Description for the Interface
- Configuring Interface Duplex and Speed
- Setting Interface Maximum Idle Time
- Bridging an Interface to a VLAN
- Specifying VLAN Trunking for an Interface
- Configuring Spanning-Tree Bridging for a VLAN or a Trunked Interface
- Configuring Port Fast on an Interface
- Showing Interface Configurations
- Shutting Down an Interface
- Shutting Down All Interfaces
- Restarting an Interface
- Restarting All Interfaces
- Configuring Circuits
- Configuring RIP for an IP Interface
- Configuring the Switched Port Analyzer Feature
- Configuring Spanning-Tree Bridging for the CSS
- CSS Spanning-Tree Bridging Quick Start
- Configuring Spanning-Tree Bridge Aging-Time
- Configuring Spanning-Tree Bridge Forward-Time
- Configuring Spanning-Tree Bridge Hello-Time
- Configuring Spanning-Tree Bridge Max-Age
- Configuring Spanning-Tree Bridge Priority
- Disabling Bridge Spanning-Tree
- Showing Bridge Configurations
- Configuring Open Shortest Path First (OSPF)
- OSPF Overview
- CSS OSPF Configuration Quick Start
- Configuring OSPF on the CSS
- Configuring OSPF on a CSS IP Interface
- Showing OSPF Information
- OSPF Configuration in a Startup-Configuration File
- Configuring the Address Resolution Protocol
- Configuring Routing Information Protocol
- Configuring the Internet Protocol
- IP Configuration Quick Start
- Configuring an IP Route
- Disabling an Implicit Service for the Static Route Next Hop
- Configuring an IP Source Route
- Configuring the IP Record Route
- Configuring Box-to-Box Redundancy
- Configuring IP Equal-Cost Multipath
- Forwarding IP Subnet Broadcast Addressed Frames
- Configuring IP Unconditional Bridging
- Configuring IP Opportunistic Layer 3 Forwarding
- Showing IP Configuration Information
- Configuring the Cisco Discovery Protocol
- Configuring the DHCP Relay Agent
- Index
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Cisco Content Services Switch Routing and Bridging Configuration Guide
OL-4580-01
Chapter 6 Configuring the Internet Protocol
Configuring an IP Route
The following running-configuration example shows the results of entering the
commands in Table 6-1.
!*************************** GLOBAL ***************************
ip no-implicit-service
ip redundancy
ip subnet-broadcast
ip route 192.168.0.0/16 192.167.1.1 1
Configuring an IP Route
A static route consists of a destination network address and mask, as well as the
next hop to reach the destination. You can also specify a default static route (using
0.0.0.0 as the destination network address and a valid next hop address) to direct
frames for which no other destination is listed in the routing table. Default static
routes are useful for forwarding otherwise unrouteable packets by the CSS.
When you configure a static route, the CSS creates an internal service that
periodically polls the configured next hop address with an ICMP echo (or ping)
keepalive. The internal service is called an implicit service. If the router fails, the
CSS removes any entries from the routing table that point to the failed router and
stops sending network traffic to the failed router. When the router recovers, the
CSS:
• Becomes aware of the router
• Reenters applicable routes into the routing table
The implicit service does not determine if the default or static route appears in the
routing table. This decision is based on the CSS having a viable ARP entry for the
next hop router IP address so the CSS can forward traffic to that destination. The
CSS uses the ICMP keepalive as a means to ensure the next hop router MAC
address is available and current. However, in certain situations, the next hop router
may block ICMP message transmitted by the CSS, which results in a failed ICMP
keepalive (the ICMP keepalive is in the Down state). As long as the CSS has the
ARP entry of the next hop router the static route is still placed in the routing table.
Note The CSS allows you to disable the internal ICMP keepalive through the
ip-no-implicit service command. In this case, if the MAC address for the next
hop is not known to the CSS the address will not appear in the routing table.