<div id="readability-page-1" class="page"><div>
                <div id="SE-5c81cdbd-9f24-4052-8460-c4dc0aa80416">
                            <p id="SE-39af873d-8610-441b-a59c-351c365ceb06"><span id="SE-61387a64-bfc5-4d1d-a502-53f5d74ced9a">Dell S4048T-ON 을 사용 중인데 1/28 포트의 PC가 10G에서 간헐적으로 -&gt; 1G 속도로 저하되는 문제 발생</span></p>
                        </div>                <div id="SE-40e16f26-0afe-4bde-96a2-3576f6aea677">
                                <p><a href="#" onclick="return false;" data-linktype="img" data-linkdata="{&quot;id&quot; : &quot;SE-40e16f26-0afe-4bde-96a2-3576f6aea677&quot;, &quot;src&quot; : &quot;https://mblogthumb-phinf.pstatic.net/MjAyMzExMjlfMjU4/MDAxNzAxMjIxMjgxMDc0.r0lTNZdvvxg-EMtXwEQweJCx5A4yuA0kHP9xzK5ULbUg.U17GJO9EyABJZCweTalwin3qpoKch-tNHQQ7Cb6pyiMg.PNG.appeal7712/image.png&quot;, &quot;originalWidth&quot; : &quot;1162&quot;, &quot;originalHeight&quot; : &quot;116&quot;, &quot;linkUse&quot; : &quot;false&quot;, &quot;link&quot; : &quot;&quot;}">
                                        <img src="https://mblogthumb-phinf.pstatic.net/MjAyMzExMjlfMjU4/MDAxNzAxMjIxMjgxMDc0.r0lTNZdvvxg-EMtXwEQweJCx5A4yuA0kHP9xzK5ULbUg.U17GJO9EyABJZCweTalwin3qpoKch-tNHQQ7Cb6pyiMg.PNG.appeal7712/image.png?type=w800" data-width="693" data-height="69" alt="">
                                    </a>
                                </p>
                        </div>
                                <div colspan="1" rowspan="1" id="SE-8192efbb-2096-4d85-b6aa-852b8f3e6a7f">
                                                <p id="SE-9932bf5c-ed10-44dd-bdd9-b0ffd1ca1b3d"><span id="SE-a6c89245-8248-4fc7-b492-5b03f08fc719">​</span></p><p id="SE-ad51e7cb-28a3-43b2-99f2-d3bad619760c"><span id="SE-51bc149d-db22-4832-bc93-d7d875e95f83">Interface TenGigabitEthernet 1/28: Ethernet has changed to lower speed than it was before</span></p>
                
                                    </div>                <div id="SE-f66fe104-dcbf-4ab5-b001-a030708bdc6c">
                                    <p id="SE-414f162a-3217-448b-9115-39cf84219ffa"><span id="SE-739d91bf-1eb4-40a4-98ca-877c6a5e8be2">​</span></p><p id="SE-f9c83796-98c1-4c2f-8ddb-28fc0ff36eeb"><span id="SE-90586c41-31ef-4120-ac46-ef13c00b40cf">​</span></p><p id="SE-0b9ef790-c7d3-421c-a4eb-78af07d664b4"><span id="SE-9a34f840-3d14-4862-b5f7-355623bdca23">스위치에 접속해 확인해 보니 실제로  1000 Mbit = 1Gbit로 동작하고 있었다.</span></p>
                            </div>                <div id="SE-5633986d-bd7a-4dbf-80de-8f2dd28f77ae">
                                <p><a href="#" onclick="return false;" data-linktype="img" data-linkdata="{&quot;id&quot; : &quot;SE-5633986d-bd7a-4dbf-80de-8f2dd28f77ae&quot;, &quot;src&quot; : &quot;https://mblogthumb-phinf.pstatic.net/MjAyMzExMjlfOTcg/MDAxNzAxMjIyMTMzNjA1.OzzS0wkMQnZi7iJ_ItP41Gmudb2VTVU1SS5oVg_ujIsg._1I8ZlYGT_coOMH_MGQLBJfJOqDZijrLrQ2Cvx_oIoog.PNG.appeal7712/image.png&quot;, &quot;originalWidth&quot; : &quot;633&quot;, &quot;originalHeight&quot; : &quot;221&quot;, &quot;linkUse&quot; : &quot;false&quot;, &quot;link&quot; : &quot;&quot;}">
                                        <img src="https://mblogthumb-phinf.pstatic.net/MjAyMzExMjlfOTcg/MDAxNzAxMjIyMTMzNjA1.OzzS0wkMQnZi7iJ_ItP41Gmudb2VTVU1SS5oVg_ujIsg._1I8ZlYGT_coOMH_MGQLBJfJOqDZijrLrQ2Cvx_oIoog.PNG.appeal7712/image.png?type=w800" data-width="633" data-height="221" alt="">
                                    </a>
                                </p>
                        </div>
                <div id="SE-1d3432cc-9ecb-43fb-894e-af8cdb02b120">
                                    <p id="SE-6b33a254-6586-4920-9960-f90d4b24ac96"><span id="SE-40da6a4a-6109-44b4-8d87-bce2aed6172f">​</span></p><p id="SE-e7e52525-6cf9-4cc5-91a4-2499c18a6105"><span id="SE-b314e50f-4a9b-4aaa-a44e-040ecd2aeccb">​</span></p><p id="SE-4c8b9a41-53a3-4b07-ac2e-1190563e5f39"><span id="SE-89ed8641-4646-49c5-a413-7a00bc46875b">​</span></p><p id="SE-cc278e88-b6b7-48d8-b411-be335ec9638a"><span id="SE-3caebcc0-6c55-4dd6-8010-be05ecde742b">​</span></p><p id="SE-ce17f26f-4ffd-42eb-939c-4923b90674e2"><span id="SE-a9bda413-e1cd-43fd-8728-dee9b849d866"><span>#혹시</span> 스위치에 Speed 10000 옵션을 고정으로 넣어주지 않아서 그런가 생각해 봤지만</span></p><p id="SE-cc1b4646-c33e-475f-b163-c4996070971d"><span id="SE-bbf21913-fbf5-4807-84c0-96a16008d77b">​</span></p><p id="SE-29babaa8-6819-4043-9d42-fb35d0a54102"><span id="SE-92b9df7b-944a-4652-afb9-fe9858c6b223">다른 포트들은 문제가 없고, 원래 아래 이미지처럼 따로 Speed 옵션을 설정해 주지 않아도</span></p><p id="SE-b418b331-18c0-472b-812f-dead30660d80"><span id="SE-671bb8ca-fc26-424e-93f8-541dee08d3c9">자동으로 IEEE 802.3 Ethernet 자동 협상 메커니즘을 통해 </span><span id="SE-c4f83328-797d-4b81-a0df-010f27e5c3de">연결된 장치들을 파라미터와 관련/연결된 장비/장치들의 능력치를 서로 공유한 다음 지원하는 최고 성능 전송 모드를 자동으로 선택한다.</span></p>
                            </div>                <div id="SE-bd0c9190-0aed-446f-973a-b5c611b977e2">
                                <p><a href="#" onclick="return false;" data-linktype="img" data-linkdata="{&quot;id&quot; : &quot;SE-bd0c9190-0aed-446f-973a-b5c611b977e2&quot;, &quot;src&quot; : &quot;https://mblogthumb-phinf.pstatic.net/MjAyMzExMjlfMjI5/MDAxNzAxMjIxNjUzMDc1.1_W7gmw0tS-DqomyyOiGLuuvFOQUpEE5BBWapsRRUp4g.CMR7eZeuxNvfBx1Vve9c209VFtaCWuxdngm3RhOZp7og.PNG.appeal7712/image.png&quot;, &quot;originalWidth&quot; : &quot;965&quot;, &quot;originalHeight&quot; : &quot;395&quot;, &quot;linkUse&quot; : &quot;false&quot;, &quot;link&quot; : &quot;&quot;}">
                                        <img src="https://mblogthumb-phinf.pstatic.net/MjAyMzExMjlfMjI5/MDAxNzAxMjIxNjUzMDc1.1_W7gmw0tS-DqomyyOiGLuuvFOQUpEE5BBWapsRRUp4g.CMR7eZeuxNvfBx1Vve9c209VFtaCWuxdngm3RhOZp7og.PNG.appeal7712/image.png?type=w800" data-width="693" data-height="283" alt="">
                                    </a>
                                </p>
                        </div>
                                <div id="SE-c4ff65ec-d2c8-4400-b3dd-7e9b293e1914">
                                <p><a href="#" onclick="return false;" data-linktype="img" data-linkdata="{&quot;id&quot; : &quot;SE-c4ff65ec-d2c8-4400-b3dd-7e9b293e1914&quot;, &quot;src&quot; : &quot;https://mblogthumb-phinf.pstatic.net/MjAyMzExMjlfNDQg/MDAxNzAxMjIxMjI5MjQw.jSl6-y8UywwEj5Qwm2hTYvJBQyL7XTNLxp5oIQHTmAkg.WaRvX460IG-0j5y0To2X65wbjvPzASBQCD7nD0SM38cg.PNG.appeal7712/image.png&quot;, &quot;originalWidth&quot; : &quot;273&quot;, &quot;originalHeight&quot; : &quot;80&quot;, &quot;linkUse&quot; : &quot;false&quot;, &quot;link&quot; : &quot;&quot;}">
                                        <img src="https://mblogthumb-phinf.pstatic.net/MjAyMzExMjlfNDQg/MDAxNzAxMjIxMjI5MjQw.jSl6-y8UywwEj5Qwm2hTYvJBQyL7XTNLxp5oIQHTmAkg.WaRvX460IG-0j5y0To2X65wbjvPzASBQCD7nD0SM38cg.PNG.appeal7712/image.png?type=w800" data-width="273" data-height="80" alt="">
                                    </a>
                                </p>
                        </div>
                <div id="SE-9e92845e-4d40-4f17-8ed9-40bdb287a2b1">
                                    <p id="SE-c01772fc-d282-4541-8dca-9f3ed6c0b134"><span id="SE-96ace173-c51e-4d6e-814f-ab237150714c">​</span></p><p id="SE-033653b8-6ee2-47b9-93db-d35d17d83d7d"><span id="SE-93f4cc15-62b4-4b13-99ad-846040d5c43c">speed를 10000고정으로 설정해 줘도 속도는 변하지 않았으며</span></p>
                            </div>                <div id="SE-b518a464-576b-4b36-8445-18bddff63891">
                                <p><a href="#" onclick="return false;" data-linktype="img" data-linkdata="{&quot;id&quot; : &quot;SE-b518a464-576b-4b36-8445-18bddff63891&quot;, &quot;src&quot; : &quot;https://mblogthumb-phinf.pstatic.net/MjAyMzExMjlfMTg2/MDAxNzAxMjIyMjY0Nzkz.H8BWX4Ed_F3mKrfvkUp3eCCUjtEy_NURK-PjoA6-6VIg.k5M5fFaDAP5zd5YXHTS1qNNkwsGDtP5RrH2ViMKbQlIg.PNG.appeal7712/image.png&quot;, &quot;originalWidth&quot; : &quot;268&quot;, &quot;originalHeight&quot; : &quot;92&quot;, &quot;linkUse&quot; : &quot;false&quot;, &quot;link&quot; : &quot;&quot;}">
                                        <img src="https://mblogthumb-phinf.pstatic.net/MjAyMzExMjlfMTg2/MDAxNzAxMjIyMjY0Nzkz.H8BWX4Ed_F3mKrfvkUp3eCCUjtEy_NURK-PjoA6-6VIg.k5M5fFaDAP5zd5YXHTS1qNNkwsGDtP5RrH2ViMKbQlIg.PNG.appeal7712/image.png?type=w800" data-width="268" data-height="92" alt="">
                                    </a>
                                </p>
                        </div>
                <div id="SE-4e056502-4ed3-4049-98ea-e23cbaef7d2a">
                                    <p id="SE-7f8c019f-2a1b-4284-87a4-5eac8ee53fc7"><span id="SE-26c75e6a-f237-4ca3-bfbc-d53dbecd0978">​</span></p><p id="SE-d94a07ea-3a18-4828-adf7-afc203c4ff9a"><span id="SE-dbbad451-64f3-47c6-8a9a-7767f8f3c774">​</span></p><p id="SE-d9948ae5-71c1-4ed0-ba8c-8dbf13c97f36"><span id="SE-49aed999-1659-4330-badc-f7c3352708ea">물리적인 문제라 판단 후에 NIC 교체를 해봤지 면 해결이 되질 않아 다른 장비도 붙여봤지만 똑같이 1G로 동작하기에 케이블 문제라 판단 짓고 케이블을 교체했더니 잘 된다.</span></p><p id="SE-0dfd401f-176e-4c4e-b1e8-13027e06dd8b"><span id="SE-2e125bb0-0402-4c12-8743-025dac281ce3">​</span></p><p id="SE-4a788587-b133-4e21-9135-22c8bed1f112"><span id="SE-f20e5667-21d3-4ab6-b84a-2293d90e23e4">역시 케이블 아니면 랜카드 문제..</span></p>
                            </div>    </div></div>

리눅스,네트워크,모의해킹 및 보안

Dell S4048T-ON 을 사용 중인데 1/28 포트의 PC가 10G에서 간헐적으로 -> 1G 속도로 저하되는 문제 발생 Zabbix를 통해 상황을 파악하였고 스위치에 접속해 확인해 보니 실제로 1000 Mbit = 1Gbit로 동작하고 있었다. #혹시 스위치에 Speed 10000 옵션을 고정으로 넣어주지 않아서 그런가 생각해 봤지만 다른 포트들은 문제가 없고, 원래 아래 이미지처럼 따로 Speed 옵션을 설정해 주지 않아도 자동으로 IEEE 802.3 Ethernet 자동 협상 메커니즘을 통해 연결된 장치들을 파라미터와 관련/연결된 장비/장치들의 능력치를 서로 공유한 다음 지원하는 최고 성능 전송 모드를 자동으로 선택한다. 아래는 해당 포트의 설정값이며 speed를 100.......

10G 스위치에 연결된 장비의 속도가 간헐적으로 1G로 떨어지는 현상 해결

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