MTU se MSS kaise nikaalein?

IP header aur TCP header ghatayein: 1500 − 20 − 20 se Ethernet IPv4 par jaana-pehchana 1460 milta hai. Tunnel overhead usse pehle katta hai.

Meri MTU 1500 ke bajaye 1492 kyun hai?

PPPoE, jo zyadatar DSL aur kai fibre links par hota hai, 6 byte PPPoE aur 2 byte PPP header jodta hai — yeh Ethernet payload se katte hain.

WireGuard tunnel par kaunsa MSS?

WireGuard IPv4 par lagbhag 60 byte aur IPv6 par 80 leta hai, to 1500 ka link kareeb 1400 aur 1360 chhodta hai.

Ping se path MTU kaise naapein?

Fragmentation band karke packets bhejein aur size ghataayein: Linux par ping -M do -s 1472, macOS par ping -D -s 1472, Windows par ping -f -l 1472. Sabse bade safal size me 28 byte joden.

MTU aur MSS Calculator

Ek MTU kitna MSS chhodti hai, IPv6, tunnels aur TCP options ke saath nikaalein.

MTU aur MSS Calculator poori tarah aapke browser me chalta hai: yeh sirf ganit karta hai, koi packet nahi bhejta aur aapka data device se bahar nahi jaata.

CIDR Subnet Calculator kholein

MTU aur MSS Calculator ke baare mein

MSS wahi hai jo link MTU me se headers ke baad bachta hai: IPv4 ke 20 byte ya IPv6 ke 40, TCP ke 20 aur, timestamps on hon to, 12 aur — plus jo bhi tunnel upar lapetta hai. Galat number saaf-suthre tareeke se fail nahi hota: jin packets ko fragment hona tha wo gayab ho jaate hain jab batane wale ICMP message filter ho, aur connection khulne ke bajaye transfer ke beech me atak jaata hai. Yeh calculator aam encapsulation ka hisaab karta hai aur ping test ko naapi hui path MTU bana deta hai.

Features

IPv4 aur IPv6 dono ke liye MTU se MSS, header breakup ke saath
PPPoE, GRE, IPsec, WireGuard, OpenVPN, VXLAN aur L2TP presets
TCP timestamp option alag se ginta hai
Ulta mode: kisi MSS se banti MTU
Sabse bade nikal jaane wale ping se path MTU
Linux, macOS aur Windows ke sahi ping commands

MTU aur MSS Calculator kaise use karein

Link ki MTU daalein — Ethernet par 1500, PPPoE ke peeche 1492
IP version aur tunnel chunein jisse traffic guzarta hai
Clamp karne wala MSS aur header breakup padhein
Shak ho to ping mode se asli path MTU naapein

Example

Input

MTU 1500 · IPv4 · WireGuard tunnel (60 bytes)

Output

Effective MTU 1440 · MSS 1400
Clamp MSS to 1400 on the tunnel interface

Encapsulation ki har layer seedhe payload se katti hai — isiliye tunnels par MSS clamping chahiye.

Common errors aur troubleshooting

Chhoti requests chalti hain, bade upload atak jaate hain. — Classic MTU black hole: koi device bade packets bina ICMP bheje gira raha hai. Yahan dikhaye MSS par clamp karein.
Capture me MSS 12 byte kam dikh raha hai. — TCP timestamps on hain aur unke option bytes har segment se katate hain. Yahan wo toggle on karein.

Aksar pooche jaane wale sawaal

MTU se MSS kaise nikaalein?: IP header aur TCP header ghatayein: 1500 − 20 − 20 se Ethernet IPv4 par jaana-pehchana 1460 milta hai. Tunnel overhead usse pehle katta hai.
Meri MTU 1500 ke bajaye 1492 kyun hai?: PPPoE, jo zyadatar DSL aur kai fibre links par hota hai, 6 byte PPPoE aur 2 byte PPP header jodta hai — yeh Ethernet payload se katte hain.
WireGuard tunnel par kaunsa MSS?: WireGuard IPv4 par lagbhag 60 byte aur IPv6 par 80 leta hai, to 1500 ka link kareeb 1400 aur 1360 chhodta hai.
Ping se path MTU kaise naapein?: Fragmentation band karke packets bhejein aur size ghataayein: Linux par ping -M do -s 1472, macOS par ping -D -s 1472, Windows par ping -f -l 1472. Sabse bade safal size me 28 byte joden.

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