Very high CRC errors observed between Catalasy 6513 and Nexus 5010.
I found our link between Catalyst 6513 and Nexus 5010(Ethernet1/18) have very high CRC errors. Is it a cable issue? Our tech support said it is because the "protocol or fromat" between 6513 and 5010 is not match, does it make sense?
Also, the port trunking between Nexus 5010-1 and Nexus 5010-2(Ethernet 1/19, 1/20) are very high, too. Our tech support said it is because it spreads from 6513, does it make sense?
We observed intermittent packet loss in this broadcast domain and I suspect maybe something wrong in these links. I would like to replace these links. Any thoughts?
1. Use the show interfaces ethernet exec command to determine the status of the router's Ethernet interfaces. The presence of many CRC errors but not many collisions is an indication of excessive noise.
2. Check cables to determine whether any are damaged.
3. Look for badly spaced taps causing reflections.
4. If you are using 100BaseTX, make sure you are using Category 5 cabling and not another type, such as Category 3.
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On 24th August 2021, Cisco announced the latest IOS XE release - Cisco IOS XE Bengaluru 17.6.1a
IOS XE 17.6.1a unlocks various routing features and enhancements comprehensively covering different technology segments such as voice, security,...
DMVPN (Dynamic Multipoint VPN) Introduced by Cisco in late 2000 is a routing technology you can use to build a VPN network with multiple sites (spokes) without having to statically configure all devices. It’s a “hub and spoke” network, where th...
SummaryRequirementsConfiguration StepsVerificationFAQTroubleshootingReferences & Tools
In the past when IOS 12.x was hot stuff we used MD5 to authenticate OSPF neighbors. This worked great on ethernet networks because OSPF is a m...
Chapter 1 – Pre-requisite
You have Root or Super Users access privileges of Cisco Prime Infrastructure.
You have access credentials of Cisco DNA Center.
You use Cisco Prime Infrastructure version 3.5 and above which is compatible with Cisco DNA Center v...