How to Troubleshoot SIA Routes In Cisco Routers?

November 28 2017

Cisco routers are known for being the reliable network sources and they are currently at the peak of their game. Being a technical device, there are time when the server or the protocols will not match with your action. Therefore, you need to learn the methods of troubleshooting SIA Routes In Cisco EIGRP Routers.

As per the Cisco Support, these routers is always trying their best to build a fast, reliable network that connects your computers, printers, copiers, and other business machines without any failure.

What Is SIA State?

Let’s first discuss about what exactly is SIA state. When an EIGRP router has not received a reply to a query from any of the neighbors in the allotted time that is calles as the SIA state. When this occurs, the EIGRP clears the neighbors who doesn’t reply and thus, logs a DUAL-3-SIA error message for the route that went active.

Troubleshooting SIA Routes Is Generally A Three-Step Process:

Check if the routes that are consistently reported as SIA.
Check if the router failed to answer queries consistently for particular routes.
Check the reason behind the router not receiving or answering queries.

Step 1

If you are logging console messages - Quick examination indicates routes are most frequently marked SIA.

Step 2s

This is a difficult step where you have to gather information through codes and it shows if the IP eigrp topology active:

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,

r - Reply status, s - sia Status

A 10.2.4.0/24, 0 successors, FD is 512640000, Q

1 replies, active 00:00:01, query-origin: Local origin

via 10.1.2.2 (Infinity/Infinity), Serial1

1 replies, active 00:00:01, query-origin: Local origin

via 10.1.3.2 (Infinity/Infinity), r, Serial3

Remaining replies:

via 10.1.1.2, r, Serial0

Any neighbors that show an R have to reply within the active timer shows how long the route has been active. Examine the neighbor to see if it is consistently waiting for replies from any of its neighbors. You can look for problems on the link to this neighbor, memory or CPU utilization, or other problems with this neighbor.

The internet networks are the most crucial communication modus currently, therefore, for any issues regarding your routers, we are happy to help. You can contact us on Cisco Support Number 1-800-954-282 and get the needed solution in the quickest time.

Original Source