300-610 · Question #199
Refer to the exhibit. A system administrator needs a solution to manage random packet drops between two Cisco UCS C240 M4 servers. The servers are connected to a pair of Cisco Nexus 7009 switches usin
The correct answer is D. Connect both servers m the same VLAN. The administrator needs to resolve random packet drops, latency, and retransmits between two servers experiencing high east-west TCP traffic.
Question
Refer to the exhibit. A system administrator needs a solution to manage random packet drops between two Cisco UCS C240 M4 servers. The servers are connected to a pair of Cisco Nexus 7009 switches using 10G fibre interfaces Both servers are generating too many east-west traffic flows from TCP-based applications which causes significant latency that impacts the customer. Also the transfer of files from Server-1 to Server-2 larger than 10 GB results in multiple retransmits. Which design solution resolves this issue?
Exhibit
Options
- AAdd a second uplink to each server NIC
- BIncrease the amount of memory m both servers
- CApply rate-limit on the server 1 VLAN interface per application flow.
- DConnect both servers m the same VLAN
How the community answered
(39 responses)- A5% (2)
- B3% (1)
- C13% (5)
- D79% (31)
Why each option
The administrator needs to resolve random packet drops, latency, and retransmits between two servers experiencing high east-west TCP traffic.
Adding a second uplink to each server NIC increases bandwidth and provides redundancy but does not inherently resolve congestion or packet drops if the issue is due to routing, latency, or processing within a shared network path.
Increasing the amount of memory in both servers addresses server-side processing or buffering issues, but it does not resolve network-related congestion, latency, or packet drops that occur between the servers on the network infrastructure.
Applying a rate-limit on the server 1 VLAN interface per application flow would restrict traffic, potentially worsening performance and latency rather than resolving packet drops and retransmits caused by network congestion.
Concept tested: Optimizing east-west traffic in a data center
Source: https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DC_3_0/DC-3_0_design_guide.html
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