--- title: Cisco troubleshooting description: loveni chyb a zakernosti nejen na switchich Cisco published: true date: 2024-12-18T13:00:38.232Z tags: switch, troubleshooting, cisco, pre-final editor: markdown dateCreated: 2024-11-19T06:38:09.988Z --- # Sériák ## Moudrý muž si na zakázku kde má Cisco vždycky bere sériák ![catalyst1000-console-port.jpg](/cisco-troubleshooting/catalyst1000-console-port.jpg) - téměř každý switch hodný svého jména má sériové rozhraní - u Cisca bývá vyveden RS232 na RJ45 pinout - připojíme se modrým kabelem a usb-serial převodníkem ![axagon-usb-to-serial.jpg](/cisco-troubleshooting/axagon-usb-to-serial.jpg)![cisco-serial-cable.jpg](/cisco-troubleshooting/cisco-serial-cable.jpg) - některé mají rovnou usb-serial převodník v sobě - mini usb - usb c - po připojení vyskočí ve Správci zařízení nový COM port ![device-manager-serial-port-a-putty.png](/cisco-troubleshooting/device-manager-serial-port-a-putty.png) - připojíme se zapomocí terminálu ([putty](https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html) je OK) - všechny switche by měly umět rychlost 9600 bd/s - většina umí víc, například 115200 bd/s - dvojím stiskem enteru necháme switch provést auto detekci rychlost - nemusí být zaplá, ale většinou je - měl by naskočit login prompt - během re/bootu switch vypisuje sám od sebe - většinou nižší rychlostí # Low level discovery - většina lepších síťových zařízení posílá na Layer 2 / MAC vrstvě packety, kterýma se identifikuje | zkratka | celé jméno | popis | | |---|---|---|---|---| | LLDP | Low level discovery protocol | spíš obecný a stručný | | CDP | Cisco Discovery protocol | preferujeme, máme ho puštěný na všech našich Cisco switchích, ale používájí ho i jiní výrobci | | MNDP | Mikrotik discovery protocol | ekvivalent výše zmíněných pro Mikrotik | ## Z počítače - zobrazíme například ve Wiresharku ![cdp-ve-wiresharku.png](/cisco-troubleshooting/cdp-ve-wiresharku.png) - na obrázku vidíme - Port ID - číslo portu ve kterém jsme zapojení - číslo VLAN - jméno switche - někdy je i popisek portu, managovací adresa switche - ... ## Z Cisco switche ### CLI / terminál ``` show cdp neighbours show cdp neighbours detail show lldp neighbours ``` - příklad vystupu ``` sg350ivanek#sho cdp nei Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge S - Switch, H - Host, I - IGMP, r - Repeater, P - VoIP Phone M - Remotely-Managed Device, C - CAST Phone Port, W - Two-Port MAC Relay Device ID Local Adv Time To Capability Platform Port ID Interface Ver. Live ------------------ ----------- ---- ------- ---------- ------------ ----------- c2960x-lopatov.avt gi10 2 157 S I cisco GigabitEthe g.cz WS-C2960X-48 rnet1/0/38 FPS-L ``` - opět vidíme co je na druhé straně kabelu - Windows 11 se hlásí zapomocí LLDP, můžeme použít jako sondu ### GUI / webové rozhraní - webové rozhraní nechávám sedět jen na https - webové rozhraní se mění, terminál zůstává stále stejný ![cisco-cdp-neighbours-gui.png](/cisco-troubleshooting/cisco-cdp-neighbours-gui.png) # Zálohy konfigurací - všechny switche co projdou IT mají někde zálohovanou konfiguraci - včetně data kdy byla pořízena - je to užitečně nejen pro případ obnovy, ale i pro rychlé zorientování - v zakázkách to bývá pod realizace a IT - nejčastější problém je domnělý versus skutečný stav nastavení portů - zjistíme snadno ## Komentované výňatky ze zálohy konfigurace Cisco Switche ``` config-file-header cabin-data3 v3.4.0.17 / RCBS3.4_950_377_325 ``` - kus vypuštěn ``` interface vlan 50 name 50control ip address 192.168.50.9 255.255.255.0 ip igmp version 2 ``` - nastavení VLAN - včetně slovního popisu name ``` interface GigabitEthernet13 description 55dante switchport access vlan 55 ! ``` - nastavení jednotlivých portů - takto vypadá access port - "platí" to co je na řádku 24 - switchport access vlan CISLOVLAN - to co je v description je slovní popis, nemusí "platit", když se stane chyba konfigurace ``` interface GigabitEthernet25 description trunk switchport mode trunk ``` - ukázka trunkovacího portu # Spanning tree / smyčky - switche se živí, tím že posílají dál packety co jim přijdou - když si s packetem neví rady, tak ho pošlo "všude" (metafora) - pokud se zapojí "všude" do "vstupu" vznikne hrnečku vař - dřív to běžně shodilo celou síť, nyní máme technologie které tomu mají zabránít - Spanning tree - L2 loop protection - ... - žádná technologie není všespásná - čím složitější, tím větší prostor pro chybu konfigurace - nebo bugy - i dneska lze udělat smyčku, ani se nemusíme moc snažit - ve chvíli kdy jsou switche ve smyčce nejde typicky nicmoc vyřešit vzdáleně ## Jak poznáme smyčku - síť má výrazně snížený výkon nebo výpadky - přijde nám "divné" DHCP z jiné VLAN - většinou se to projeví dost rychle ## Jak naložit se smyčkou ### Rychlý způsob - protože se smyčka projeví většinou rychle, stačí se zamyslet na posledními změnami - postupně je vrátit zpátky - smyčka by měla zmizet ### Pomalý způsob - rozděl a panuj - vypneme / rozpojíme celou síť - postupně přidáváme - tam kde naskočí potíž můžeme jet jednotlivé porty - odpojíme problematickou část # PoE - aktivní PoE se první musí vyjednat po LLDP - ne všichni klienti rozumí všem switchům - někdy zařízení při startu berou příliš velký proud - cisco typicky dává 450 mA - někdy Cisco vezme zařízení připojované postupně, ale při re/bootu, když naběhnou všechny najednou tak to nedá a zhodí celý PoE ## Diagnostika - z terminálu ``` show power inline ``` - ukázka výstupu ``` Power-limit mode: Class based Usage threshold: 95% Trap: Disable Legacy Mode: Enable Inrush Test: Enable Guard-Band Value: Static (2W) Unit Module Nominal Allocated Temp SW PSE chipset Power (W) Power (W) (C) Version HW Revision ---- ---------------- --------- ------------ -------- ------------- ----------------- 1 CBS350-48P-4X 370 75 (20%) 41 0.2.0.34 TPS2388 - 0x40C4 TPS2388 - 0x40C4 TPS2388 - 0x40C4 TPS2388 - 0x40C4 TPS2388 - 0x40C4 TPS2388 - 0x40C4 Interface Admin Oper Power (W) Class Device Priority ---------- ---------- ----------- ----------------- ----- -------------- -------- gi1/0/1 Never Off 0.0 - low gi1/0/2 Auto Searching 0.0 - low gi1/0/3 Never Off 0.0 - low gi1/0/4 Never Off 0.0 - low gi1/0/5 Auto On 1.81 0 low gi1/0/6 Never Off 0.0 - low ... gi1/0/10 Auto Fault 0.0 - low ... ``` - případne detail rozhraní (gi1/0/10 je jméno rozhraní, stačí zkopírovat z předchozího kroku) ``` show power inline gi1/0/10 ``` - ukázka výstupu ``` Interface Admin Oper Power (W) Class Device Priority ---------- ---------- ----------- ----------------- ----- -------------- -------- gi1/0/10 Auto Fault 0.0 - low Port Status: Port is off. Short condition Port standard: 802.3AT Admin power limit (for port power-limit mode): 30.0 watts Time range: Operational power limit: 30.0 watts Negotiated power: 0.0 watts (None) Current (mA): 0 Voltage(V): 0.0 Overload Counter: 0 Short Counter: 4597812 Denied Counter: 0 Absent Counter: 9 Invalid Signature Counter: 0 ``` - s tímhle portem je mrzení - je ve zkratu co se týče PoE - je vypnutý co se týče PoE ## Rešení - rozděl a panuj - najít nekompatabilní zařízení a přehodit na injektor - zkusit očistit porty po celé trase, jestli se nekde opravdu neděje zkrat - injektor má nevýhody - další krabička - zařízení se pak nedá na dálku resetovat - není vidět jestli a kolik bere proudu # ukázka komplet low level discovery výstupu
Ukázky z různých zařízení Link Layer Discovery Protocol Chassis Subtype = Locally assigned, Id: cbs350-it-test 0000 001. .... .... = TLV Type: Chassis Id (1) .... ...0 0000 1111 = TLV Length: 15 Chassis Id Subtype: Locally assigned (7) Chassis Id: 6362733335302d69742d74657374 Port Subtype = MAC address, Id: a0:0f:37:2b:ca:f9 0000 010. .... .... = TLV Type: Port Id (2) .... ...0 0000 0111 = TLV Length: 7 Port Id Subtype: MAC address (3) Port Id: Cisco_2b:ca:f9 (a0:0f:37:2b:ca:f9) Time To Live = 120 sec [Normal LLDPDU] 0000 011. .... .... = TLV Type: Time to Live (3) .... ...0 0000 0010 = TLV Length: 2 Seconds: 120 Telecommunications Industry Association TR-41 Committee - Media Capabilities 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 0111 = TLV Length: 7 Organization Unique Code: 00:12:bb (Telecommunications Industry Association TR-41 Committee) Media Subtype: Media Capabilities (0x01) Capabilities: 0x002f .... .... .... ...1 = LLDP-MED Capabilities: Capable .... .... .... ..1. = Network Policy: Capable .... .... .... .1.. = Location Identification: Capable .... .... .... 1... = Extended Power via MDI-PSE: Capable .... .... ...0 .... = Extended Power via MDI-PD: Not capable .... .... ..1. .... = Inventory: Capable Class Type: Network Connectivity (4) Ieee 802.3 - MAC/PHY Configuration/Status 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 1001 = TLV Length: 9 Organization Unique Code: 00:12:0f (Ieee 802.3) IEEE 802.3 Subtype: MAC/PHY Configuration/Status (0x01) Auto-Negotiation Support/Status: 0x03 .... ...1 = Auto-Negotiation: Supported .... ..1. = Auto-Negotiation: Enabled PMD Auto-Negotiation Advertised Capability: 0x6c01 .... .... .... ...1 = 1000BASE-T (full duplex mode): Capable .... .... .... ..0. = 1000BASE-T (half duplex mode): Not capable .... .... .... .0.. = 1000BASE-X (-LX, -SX, -CX full duplex mode): Not capable .... .... .... 0... = 1000BASE-X (-LX, -SX, -CX half duplex mode): Not capable .... .... ...0 .... = Asymmetric and Symmetric PAUSE (for full-duplex links): Not capable .... .... ..0. .... = Symmetric PAUSE (for full-duplex links): Not capable .... .... .0.. .... = Asymmetric PAUSE (for full-duplex links): Not capable .... .... 0... .... = PAUSE (for full-duplex links): Not capable .... ...0 .... .... = 100BASE-T2 (full duplex mode): Not capable .... ..0. .... .... = 100BASE-T2 (half duplex mode): Not capable .... .1.. .... .... = 100BASE-TX (full duplex mode): Capable .... 1... .... .... = 100BASE-TX (half duplex mode): Capable ...0 .... .... .... = 100BASE-T4: Not capable ..1. .... .... .... = 10BASE-T (full duplex mode): Capable .1.. .... .... .... = 10BASE-T (half duplex mode): Capable 0... .... .... .... = Other or unknown: Not capable Same in inverse (wrong) bitorder 0... .... .... .... = 1000BASE-T (full duplex mode): Not capable .1.. .... .... .... = 1000BASE-T (half duplex mode): Capable ..1. .... .... .... = 1000BASE-X (-LX, -SX, -CX full duplex mode): Capable ...0 .... .... .... = 1000BASE-X (-LX, -SX, -CX half duplex mode): Not capable .... 1... .... .... = Asymmetric and Symmetric PAUSE (for full-duplex links): Capable .... .1.. .... .... = Symmetric PAUSE (for full-duplex links): Capable .... ..0. .... .... = Asymmetric PAUSE (for full-duplex links): Not capable .... ...0 .... .... = PAUSE (for full-duplex links): Not capable .... .... 0... .... = 100BASE-T2 (full duplex mode): Not capable .... .... .0.. .... = 100BASE-T2 (half duplex mode): Not capable .... .... ..0. .... = 100BASE-TX (full duplex mode): Not capable .... .... ...0 .... = 100BASE-TX (half duplex mode): Not capable .... .... .... 0... = 100BASE-T4: Not capable .... .... .... .0.. = 10BASE-T (full duplex mode): Not capable .... .... .... ..0. = 10BASE-T (half duplex mode): Not capable .... .... .... ...1 = Other or unknown: Capable Operational MAU Type: 1000BaseTFD - Four-pair Category 5 UTP, full duplex mode (0x001e) System Name = cbs350-it-test 0000 101. .... .... = TLV Type: System Name (5) .... ...0 0000 1110 = TLV Length: 14 System Name: cbs350-it-test Capabilities 0000 111. .... .... = TLV Type: System Capabilities (7) .... ...0 0000 0100 = TLV Length: 4 Capabilities: 0x0004 .... .... .... ...0 = Other: Not capable .... .... .... ..0. = Repeater: Not capable .... .... .... .1.. = Bridge: Capable .... .... .... 0... = WLAN access point: Not capable .... .... ...0 .... = Router: Not capable .... .... ..0. .... = Telephone: Not capable .... .... .0.. .... = DOCSIS cable device: Not capable .... .... 0... .... = Station only: Not capable .... ...0 .... .... = C-VLAN component: Not capable .... ..0. .... .... = S-VLAN component: Not capable .... .0.. .... .... = TPMR component: Not capable Enabled Capabilities: 0x0004 .... .... .... ...0 = Other: Not capable .... .... .... ..0. = Repeater: Not capable .... .... .... .1.. = Bridge: Capable .... .... .... 0... = WLAN access point: Not capable .... .... ...0 .... = Router: Not capable .... .... ..0. .... = Telephone: Not capable .... .... .0.. .... = DOCSIS cable device: Not capable .... .... 0... .... = Station only: Not capable .... ...0 .... .... = C-VLAN component: Not capable .... ..0. .... .... = S-VLAN component: Not capable .... .0.. .... .... = TPMR component: Not capable Management Address 0001 000. .... .... = TLV Type: Management Address (8) .... ...0 0000 1100 = TLV Length: 12 Address String Length: 5 Address Subtype: IPv4 (1) Management Address: 10.1.10.174 Interface Subtype: ifIndex (2) Interface Number: 100009 OID String Length: 0 IEEE 802.1 Chair - Port VLAN ID 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 0110 = TLV Length: 6 Organization Unique Code: 00:80:c2 (IEEE 802.1 Chair) IEEE 802.1 Subtype: Port VLAN ID (0x01) Port VLAN Identifier: 10 (0x000a) End of LLDPDU 0000 000. .... .... = TLV Type: End of LLDPDU (0) .... ...0 0000 0000 = TLV Length: 0 Cisco Discovery Protocol Version: 2 TTL: 180 seconds Checksum: 0x3b56 [correct] [Checksum Status: Good] Device ID: cbs350-it-test Type: Device ID (0x0001) Length: 18 Device ID: cbs350-it-test Addresses Type: Addresses (0x0002) Length: 17 Number of addresses: 1 IP address: 10.1.10.174 Protocol type: NLPID (0x01) Protocol length: 1 Protocol: IP Address length: 4 IP Address: 10.1.10.174 Port ID: gi7 Type: Port ID (0x0003) Length: 7 Sent through Interface: gi7 Capabilities Type: Capabilities (0x0004) Length: 8 Capabilities: 0x00000029 .... .... .... .... .... .... .... ...1 = Router: Yes .... .... .... .... .... .... .... ..0. = Transparent Bridge: No .... .... .... .... .... .... .... .0.. = Source Route Bridge: No .... .... .... .... .... .... .... 1... = Switch: Yes .... .... .... .... .... .... ...0 .... = Host: No .... .... .... .... .... .... ..1. .... = IGMP capable: Yes .... .... .... .... .... .... .0.. .... = Repeater: No .... .... .... .... .... .... 0... .... = VoIP Phone: No .... .... .... .... .... ...0 .... .... = Remotely Managed Device: No .... .... .... .... .... ..0. .... .... = CVTA/STP Dispute Resolution/Cisco VT Camera: No .... .... .... .... .... .0.. .... .... = Two Port Mac Relay: No Software Version Type: Software version (0x0005) Length: 12 Software version: 3.4.0.17 Platform: Cisco CBS350-8P-E-2G (PID:CBS350-8P-E-2G)-VSD Type: Platform (0x0006) Length: 49 Platform: Cisco CBS350-8P-E-2G (PID:CBS350-8P-E-2G)-VSD Native VLAN: 10 Type: Native VLAN (0x000a) Length: 6 Native VLAN: 10 Duplex: Full Type: Duplex (0x000b) Length: 5 Duplex: Full Trust Bitmap: 0x00 Type: Trust Bitmap (0x0012) Length: 5 Trust Bitmap: 0x00 Untrusted port CoS: 0x00 Type: Untrusted Port CoS (0x0013) Length: 5 Untrusted port CoS: 0x00 System Name: cbs350-it-test Type: System Name (0x0014) Length: 18 System Name: cbs350-it-test Power Available: 30000 mW, 4294967295 mW Type: Power Available (0x001a) Length: 16 Request-ID: 0 Management-ID: 956 Power Available: 30000mW Power Available: 4294967295mW Mikrotik Neighbor Discovery Protocol Header Unknown: 7cef SeqNo: 0 T 1, L 6: MAC-Address TlvType: 1 = MAC-Address TlvLength: 6 MAC-Address: VMware_55:13:39 (00:0c:29:55:13:39) T 5, L 10: Identity TlvType: 5 = Identity TlvLength: 10 Identity: chr-opatov T 7, L 35: Version TlvType: 7 = Version TlvLength: 35 Version: 7.16.1 (stable) 2024-10-10 14:03:32 T 8, L 8: Platform TlvType: 8 = Platform TlvLength: 8 Platform: MikroTik T 10, L 4: Uptime TlvType: 10 = Uptime TlvLength: 4 Uptime: 1832996.000000000 seconds T 11, L 11: Software-ID TlvType: 11 = Software-ID TlvLength: 11 Software-ID: Dr+43uz+oDE T 12, L 3: Board TlvType: 12 = Board TlvLength: 3 Board: CHR T 14, L 1: Unpack TlvType: 14 = Unpack TlvLength: 1 Unpack: None (1) T 15, L 16: IPv6-Address TlvType: 15 = IPv6-Address TlvLength: 16 IPv6-Address: fe80::20c:29ff:fe55:1339 T 16, L 10: Interface name TlvType: 16 = Interface name TlvLength: 10 Interface name: 10pocitaky T 17, L 4: IPv4-Address TlvType: 17 = IPv4-Address TlvLength: 4 IPv4-Address: 10.1.10.1 Link Layer Discovery Protocol Chassis Subtype = MAC address, Id: 94:18:65:77:33:44 0000 001. .... .... = TLV Type: Chassis Id (1) .... ...0 0000 0111 = TLV Length: 7 Chassis Id Subtype: MAC address (4) Chassis Id: Netgear_77:33:44 (94:18:65:77:33:44) Port Subtype = Interface name, Id: 0/7 0000 010. .... .... = TLV Type: Port Id (2) .... ...0 0000 0100 = TLV Length: 4 Port Id Subtype: Interface name (5) Port Id: 0/7 Time To Live = 120 sec [Normal LLDPDU] 0000 011. .... .... = TLV Type: Time to Live (3) .... ...0 0000 0010 = TLV Length: 2 Seconds: 120 Port Description = 0/7 0000 100. .... .... = TLV Type: Port Description (4) .... ...0 0000 0011 = TLV Length: 3 Port Description: 0/7 System Name = m4250-8g2xf-test 0000 101. .... .... = TLV Type: System Name (5) .... ...0 0001 0000 = TLV Length: 16 System Name: m4250-8g2xf-test System Description = M4250-8G2XF-PoE+ 8x1G PoE+ 220W and 2xSFP+ Managed Switch, 13.0.4.26, 1.0.0.11 0000 110. .... .... = TLV Type: System Description (6) .... ...0 0100 1110 = TLV Length: 78 System Description: M4250-8G2XF-PoE+ 8x1G PoE+ 220W and 2xSFP+ Managed Switch, 13.0.4.26, 1.0.0.11 Capabilities 0000 111. .... .... = TLV Type: System Capabilities (7) .... ...0 0000 0100 = TLV Length: 4 Capabilities: 0x0014 .... .... .... ...0 = Other: Not capable .... .... .... ..0. = Repeater: Not capable .... .... .... .1.. = Bridge: Capable .... .... .... 0... = WLAN access point: Not capable .... .... ...1 .... = Router: Capable .... .... ..0. .... = Telephone: Not capable .... .... .0.. .... = DOCSIS cable device: Not capable .... .... 0... .... = Station only: Not capable .... ...0 .... .... = C-VLAN component: Not capable .... ..0. .... .... = S-VLAN component: Not capable .... .0.. .... .... = TPMR component: Not capable Enabled Capabilities: 0x0014 .... .... .... ...0 = Other: Not capable .... .... .... ..0. = Repeater: Not capable .... .... .... .1.. = Bridge: Capable .... .... .... 0... = WLAN access point: Not capable .... .... ...1 .... = Router: Capable .... .... ..0. .... = Telephone: Not capable .... .... .0.. .... = DOCSIS cable device: Not capable .... .... 0... .... = Station only: Not capable .... ...0 .... .... = C-VLAN component: Not capable .... ..0. .... .... = S-VLAN component: Not capable .... .0.. .... .... = TPMR component: Not capable IEEE 802.1 Chair - Port VLAN ID 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 0110 = TLV Length: 6 Organization Unique Code: 00:80:c2 (IEEE 802.1 Chair) IEEE 802.1 Subtype: Port VLAN ID (0x01) Port VLAN Identifier: 2 (0x0002) Management Address 0001 000. .... .... = TLV Type: Management Address (8) .... ...0 0010 0110 = TLV Length: 38 Address String Length: 5 Address Subtype: IPv4 (1) Management Address: 10.1.1.110 Interface Subtype: ifIndex (2) Interface Number: 17 OID String Length: 26 Object Identifier: 1.9.46.51.46.54.46.49.46.52.46.49.46.52.53.50.54.46.49.48.48.46.49.49.46.52.48 (iso.9.46.51.46.54.46.49.46.52.46.49.46.52.53.50.54.46.49.48.48.46.49.49.46.52.48) Ieee 802.3 - Power Via MDI 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 1100 = TLV Length: 12 Organization Unique Code: 00:12:0f (Ieee 802.3) IEEE 802.3 Subtype: Power Via MDI (0x02) MDI Power Support: 0x0f .... ...1 = Port Class: PSE .... ..1. = PSE MDI Power: Supported .... .1.. = PSE MDI Power: Enabled .... 1... = PSE Pairs Control Ability: Yes PSE Power Pair: Signal (1) Power Class: Unknown (0) 00.. .... = Power Type: Type 2 PSE Device (0) ..01 .... = Power Source: 1 Primary Power Source .... .0.. = PD 4PID: Not supported .... ..11 = Power Priority: Low (3) PD Requested Power Value: 0.0. Watt PSE Allocated Power Value: 0.0. Watt Ieee 802.3 - Link Aggregation 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 1001 = TLV Length: 9 Organization Unique Code: 00:12:0f (Ieee 802.3) IEEE 802.3 Subtype: Link Aggregation (0x03) [Expert Info (Warning/Protocol): TLV has been deprecated] [TLV has been deprecated] [Severity level: Warning] [Group: Protocol] Aggregation Status: 0x01 .... ...1 = Aggregation Capability: Yes .... ..0. = Aggregation Status: Disabled Aggregated Port Id: 0 Ieee 802.3 - Maximum Frame Size 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 0110 = TLV Length: 6 Organization Unique Code: 00:12:0f (Ieee 802.3) IEEE 802.3 Subtype: Maximum Frame Size (0x04) Maximum Frame Size: 9216 Ieee 802.3 - MAC/PHY Configuration/Status 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 1001 = TLV Length: 9 Organization Unique Code: 00:12:0f (Ieee 802.3) IEEE 802.3 Subtype: MAC/PHY Configuration/Status (0x01) Auto-Negotiation Support/Status: 0x03 .... ...1 = Auto-Negotiation: Supported .... ..1. = Auto-Negotiation: Enabled PMD Auto-Negotiation Advertised Capability: 0x6c03 .... .... .... ...1 = 1000BASE-T (full duplex mode): Capable .... .... .... ..1. = 1000BASE-T (half duplex mode): Capable .... .... .... .0.. = 1000BASE-X (-LX, -SX, -CX full duplex mode): Not capable .... .... .... 0... = 1000BASE-X (-LX, -SX, -CX half duplex mode): Not capable .... .... ...0 .... = Asymmetric and Symmetric PAUSE (for full-duplex links): Not capable .... .... ..0. .... = Symmetric PAUSE (for full-duplex links): Not capable .... .... .0.. .... = Asymmetric PAUSE (for full-duplex links): Not capable .... .... 0... .... = PAUSE (for full-duplex links): Not capable .... ...0 .... .... = 100BASE-T2 (full duplex mode): Not capable .... ..0. .... .... = 100BASE-T2 (half duplex mode): Not capable .... .1.. .... .... = 100BASE-TX (full duplex mode): Capable .... 1... .... .... = 100BASE-TX (half duplex mode): Capable ...0 .... .... .... = 100BASE-T4: Not capable ..1. .... .... .... = 10BASE-T (full duplex mode): Capable .1.. .... .... .... = 10BASE-T (half duplex mode): Capable 0... .... .... .... = Other or unknown: Not capable Same in inverse (wrong) bitorder 0... .... .... .... = 1000BASE-T (full duplex mode): Not capable .1.. .... .... .... = 1000BASE-T (half duplex mode): Capable ..1. .... .... .... = 1000BASE-X (-LX, -SX, -CX full duplex mode): Capable ...0 .... .... .... = 1000BASE-X (-LX, -SX, -CX half duplex mode): Not capable .... 1... .... .... = Asymmetric and Symmetric PAUSE (for full-duplex links): Capable .... .1.. .... .... = Symmetric PAUSE (for full-duplex links): Capable .... ..0. .... .... = Asymmetric PAUSE (for full-duplex links): Not capable .... ...0 .... .... = PAUSE (for full-duplex links): Not capable .... .... 0... .... = 100BASE-T2 (full duplex mode): Not capable .... .... .0.. .... = 100BASE-T2 (half duplex mode): Not capable .... .... ..0. .... = 100BASE-TX (full duplex mode): Not capable .... .... ...0 .... = 100BASE-TX (half duplex mode): Not capable .... .... .... 0... = 100BASE-T4: Not capable .... .... .... .0.. = 10BASE-T (full duplex mode): Not capable .... .... .... ..1. = 10BASE-T (half duplex mode): Capable .... .... .... ...1 = Other or unknown: Capable Operational MAU Type: 1000BaseTFD - Four-pair Category 5 UTP, full duplex mode (0x001e) Telecommunications Industry Association TR-41 Committee - Media Capabilities 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 0111 = TLV Length: 7 Organization Unique Code: 00:12:bb (Telecommunications Industry Association TR-41 Committee) Media Subtype: Media Capabilities (0x01) Capabilities: 0x002f .... .... .... ...1 = LLDP-MED Capabilities: Capable .... .... .... ..1. = Network Policy: Capable .... .... .... .1.. = Location Identification: Capable .... .... .... 1... = Extended Power via MDI-PSE: Capable .... .... ...0 .... = Extended Power via MDI-PD: Not capable .... .... ..1. .... = Inventory: Capable Class Type: Network Connectivity (4) Netgear - Unknown (101) 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 1100 = TLV Length: 12 Organization Unique Code: 8c:3b:ad (Netgear) Unknown Subtype: 101 Unknown Subtype Content: 0000000300000003 IEEE 802.1 Chair - VLAN Name 1111 111. .... .... = TLV Type: Organization Specific (127) .... ...0 0000 1111 = TLV Length: 15 Organization Unique Code: 00:80:c2 (IEEE 802.1 Chair) IEEE 802.1 Subtype: VLAN Name (0x03) VLAN Identifier: 2 (0x0002) VLAN Name Length: 8 VLAN Name: VLAN0002 End of LLDPDU 0000 000. .... .... = TLV Type: End of LLDPDU (0) .... ...0 0000 0000 = TLV Length: 0 Cisco Discovery Protocol Version: 2 TTL: 180 seconds Checksum: 0x4235 [correct] [Checksum Status: Good] Device ID: 6YX32953A00C8 Type: Device ID (0x0001) Length: 17 Device ID: 6YX32953A00C8 Platform: M4250-8G2XF-PoE+ Type: Platform (0x0006) Length: 20 Platform: M4250-8G2XF-PoE+ Capabilities Type: Capabilities (0x0004) Length: 8 Capabilities: 0x00000001 .... .... .... .... .... .... .... ...1 = Router: Yes .... .... .... .... .... .... .... ..0. = Transparent Bridge: No .... .... .... .... .... .... .... .0.. = Source Route Bridge: No .... .... .... .... .... .... .... 0... = Switch: No .... .... .... .... .... .... ...0 .... = Host: No .... .... .... .... .... .... ..0. .... = IGMP capable: No .... .... .... .... .... .... .0.. .... = Repeater: No .... .... .... .... .... .... 0... .... = VoIP Phone: No .... .... .... .... .... ...0 .... .... = Remotely Managed Device: No .... .... .... .... .... ..0. .... .... = CVTA/STP Dispute Resolution/Cisco VT Camera: No .... .... .... .... .... .0.. .... .... = Two Port Mac Relay: No Software Version Type: Software version (0x0005) Length: 13 Software version: 13.0.4.26 Addresses Type: Addresses (0x0002) Length: 26 Number of addresses: 2 IP address: 10.1.10.196 Protocol type: NLPID (0x01) Protocol length: 1 Protocol: IP Address length: 4 IP Address: 10.1.10.196 IP address: 10.1.1.110 Protocol type: NLPID (0x01) Protocol length: 1 Protocol: IP Address length: 4 IP Address: 10.1.1.110 Port ID: 0/7 Type: Port ID (0x0003) Length: 7 Sent through Interface: 0/7 Native VLAN: 2 Type: Native VLAN (0x000a) Length: 6 Native VLAN: 2