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Core issueWhen the interface Command-Line Interface (CLI) wrr-queue queue-limit command is issued on a Cisco Catalyst 3550 switch with high traffic, certain queue-limit values can cause the switch to reset. This can happen when there is a high rate ...

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Core IssueTo address the need for high availability and scalability, networks often use multiple parallel links. To provide aggregate bandwidth greater than that available with a single link, parallel links are used. Load balancing occurs when traffi...

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Core issueThe transmit lockups have been reported to occur in most cases on ports operating at speed 10 and duplex half.The transmit (Tx) lockups can be recreated in the lab when there is a rapid increase in the rate of change of traffic transmitted ...

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Core issueWhen a packet enters the device, the device attempts to forward it at interrupt level. If a match cannot be found in an appropriate cache table, the packet is queued in the input queue of the incoming interface to be processed. Some packets...

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Core issueThis message indicates that an NVRAM write operation has failed due to lack of space. The first [dec] is the configuration block that was being written to NVRAM, the second [dec] is the size of the configuration that was being written to NV...

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Core issueThe message indicates that all memory for sending high priority messages is used up. The source of the problem could be unicasts, broadcasts or multicasts that are generated at a rate the switch cannot handle. The error is related to a cosm...

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Core issueThese messages indicate that the MultiLayer Switching (MLS) table on your Catalyst is deleting specific multicast flows.The multicast messages may look similar to this:%MCAST-6-DELGDA:Deleting a GDA 01-00-aa-bb-cc-dd in vlan This means that...

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Core issueA TLB (Load/Fetch) exception occurs when the CPU tries to access an invalid virtual address and appears similar to this sample:*** TLB (Load/Fetch) Exception ***Access address = 0x1478PC = 0x1478, Cause = 0x8008, Status Reg = 0x30410002This...

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ResolutionThe Cisco Catalyst 3750 series switches cannot stack with the Cisco Catalyst 3550 Series Switches. The Cisco Catalyst 3750 series switches' new, innovative Cisco StackWise  technology with a 32-Gbps high-speed stack interconnect is not comp...

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Core IssueAn A indicates that an Access Control List (ACL) is blocking the traceroute command traffic.ResolutionIdentify the last-hop router in the traceroute command output. Check for any ACL configured on the last-hop router or next routers on the ...

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Core IssueIn order for routes to be redistributed into Enhanced Interior Gateway Routing Protocol (EIGRP), a metric must be associated with the routes. This is usually done by including the metrics field in the redistribute command.ResolutionEnsure t...

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