Maximum number of routes nearing (IPv4) for Cisco

Vendor

Cisco

Description

Many devices have a limit for the number of IPv4 routes that can be defined. Indeni will alert prior to the number of routes reaching the limit.

Remediation Steps

Consider removing certain routes.

1. Execute the "show ip route summary" command to display the current contents of the IPv4 routing table in summary format.

2. Consider to deploy route summarization to decrease the total number of ipv4 prefixes.

3. Consider to clean up the configuration from unused routes.

How does this work?

This script logs into the Cisco Nexus switch using SSH and retrieves the output of the "show inventory" command. The reported device type is used to identify the max routes value based on a static table. Nexus 3000: 40,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus3000/sw/scalability/7x/b_Nexus3k_Verified_Scalability_7x/b_Nexus3k_Verified_Scalability_7x_chapter_01.html) Nexus 5000: 7,200 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration_limits/limits_513/nexus_5000_config_limits_513.html) Nexus 5500: 7,200 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5500/sw/Verified_Scalability/700N11/b_N5500_Verified_Scalability_700N11/b_N5500_Verified_Scalability_700N11_chapter_01.html Nexus 5600: 8,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5600/sw/verified_scalability/701N11/b_N5600_Verified_Scalability_701N11/b_N6000_Verified_Scalability_700N11_chapter_01.html) Nexus 6000: 8,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5600/sw/verified_scalability/701N11/b_N5600_Verified_Scalability_701N11/b_N6000_Verified_Scalability_700N11_chapter_01.html) Nexus 7000: 56,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/6_x/nx-os/unicast/configuration/guide/b-7k-Cisco-Nexus-7000-Series-NX-OS-Unicast-Routing-Configuration-Guide-Release-6x/n7k_unicast_managinging_rib_fib.html) Nexus 9300: 12,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/scalability/guide_703I11/b_Cisco_Nexus_9000_Series_NX-OS_Verified_Scalability_Guide_703I11.html) Nexus 9500: 128,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/scalability/guide_703I11/b_Cisco_Nexus_9000_Series_NX-OS_Verified_Scalability_Guide_703I11.html)

Why is this important?

This script logs into the Cisco Nexus switch using SSH and retrieves the output of the "show inventory" command. The reported device type is used to identify the max routes value based on a static table. Nexus 3000: 40,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus3000/sw/scalability/7x/b_Nexus3k_Verified_Scalability_7x/b_Nexus3k_Verified_Scalability_7x_chapter_01.html) Nexus 5000: 7,200 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration_limits/limits_513/nexus_5000_config_limits_513.html) Nexus 5500: 7,200 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5500/sw/Verified_Scalability/700N11/b_N5500_Verified_Scalability_700N11/b_N5500_Verified_Scalability_700N11_chapter_01.html Nexus 5600: 8,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5600/sw/verified_scalability/701N11/b_N5600_Verified_Scalability_701N11/b_N6000_Verified_Scalability_700N11_chapter_01.html) Nexus 6000: 8,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5600/sw/verified_scalability/701N11/b_N5600_Verified_Scalability_701N11/b_N6000_Verified_Scalability_700N11_chapter_01.html) Nexus 7000: 56,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/6_x/nx-os/unicast/configuration/guide/b-7k-Cisco-Nexus-7000-Series-NX-OS-Unicast-Routing-Configuration-Guide-Release-6x/n7k_unicast_managinging_rib_fib.html) Nexus 9300: 12,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/scalability/guide_703I11/b_Cisco_Nexus_9000_Series_NX-OS_Verified_Scalability_Guide_703I11.html) Nexus 9500: 128,000 (http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/scalability/guide_703I11/b_Cisco_Nexus_9000_Series_NX-OS_Verified_Scalability_Guide_703I11.html)

Without Indeni how would you find this?

This data is not available through SNMP or syslog. The administrator would have to find this information from the official Data sheet of each Cisco Nexus model.


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