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1da177e4 LT |
1 | # |
2 | # IP configuration | |
3 | # | |
4 | config IP_MULTICAST | |
5 | bool "IP: multicasting" | |
1da177e4 LT |
6 | help |
7 | This is code for addressing several networked computers at once, | |
8 | enlarging your kernel by about 2 KB. You need multicasting if you | |
9 | intend to participate in the MBONE, a high bandwidth network on top | |
10 | of the Internet which carries audio and video broadcasts. More | |
11 | information about the MBONE is on the WWW at | |
12 | <http://www-itg.lbl.gov/mbone/>. Information about the multicast | |
13 | capabilities of the various network cards is contained in | |
14 | <file:Documentation/networking/multicast.txt>. For most people, it's | |
15 | safe to say N. | |
16 | ||
17 | config IP_ADVANCED_ROUTER | |
18 | bool "IP: advanced router" | |
1da177e4 LT |
19 | ---help--- |
20 | If you intend to run your Linux box mostly as a router, i.e. as a | |
21 | computer that forwards and redistributes network packets, say Y; you | |
22 | will then be presented with several options that allow more precise | |
23 | control about the routing process. | |
24 | ||
25 | The answer to this question won't directly affect the kernel: | |
26 | answering N will just cause the configurator to skip all the | |
27 | questions about advanced routing. | |
28 | ||
29 | Note that your box can only act as a router if you enable IP | |
30 | forwarding in your kernel; you can do that by saying Y to "/proc | |
31 | file system support" and "Sysctl support" below and executing the | |
32 | line | |
33 | ||
34 | echo "1" > /proc/sys/net/ipv4/ip_forward | |
35 | ||
36 | at boot time after the /proc file system has been mounted. | |
37 | ||
38 | If you turn on IP forwarding, you will also get the rp_filter, which | |
39 | automatically rejects incoming packets if the routing table entry | |
40 | for their source address doesn't match the network interface they're | |
41 | arriving on. This has security advantages because it prevents the | |
42 | so-called IP spoofing, however it can pose problems if you use | |
43 | asymmetric routing (packets from you to a host take a different path | |
44 | than packets from that host to you) or if you operate a non-routing | |
45 | host which has several IP addresses on different interfaces. To turn | |
46 | rp_filter off use: | |
47 | ||
48 | echo 0 > /proc/sys/net/ipv4/conf/<device>/rp_filter | |
49 | or | |
50 | echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter | |
51 | ||
52 | If unsure, say N here. | |
53 | ||
bb298ca3 DM |
54 | choice |
55 | prompt "Choose IP: FIB lookup algorithm (choose FIB_HASH if unsure)" | |
56 | depends on IP_ADVANCED_ROUTER | |
6876f95f | 57 | default ASK_IP_FIB_HASH |
bb298ca3 | 58 | |
6876f95f | 59 | config ASK_IP_FIB_HASH |
bb298ca3 DM |
60 | bool "FIB_HASH" |
61 | ---help--- | |
62 | Current FIB is very proven and good enough for most users. | |
63 | ||
64 | config IP_FIB_TRIE | |
65 | bool "FIB_TRIE" | |
66 | ---help--- | |
44c09201 | 67 | Use new experimental LC-trie as FIB lookup algorithm. |
bb298ca3 DM |
68 | This improves lookup performance if you have a large |
69 | number of routes. | |
70 | ||
71 | LC-trie is a longest matching prefix lookup algorithm which | |
72 | performs better than FIB_HASH for large routing tables. | |
73 | But, it consumes more memory and is more complex. | |
74 | ||
75 | LC-trie is described in: | |
76 | ||
77 | IP-address lookup using LC-tries. Stefan Nilsson and Gunnar Karlsson | |
78 | IEEE Journal on Selected Areas in Communications, 17(6):1083-1092, June 1999 | |
79 | An experimental study of compression methods for dynamic tries | |
80 | Stefan Nilsson and Matti Tikkanen. Algorithmica, 33(1):19-33, 2002. | |
81 | http://www.nada.kth.se/~snilsson/public/papers/dyntrie2/ | |
82 | ||
83 | endchoice | |
84 | ||
bb298ca3 | 85 | config IP_FIB_HASH |
6876f95f | 86 | def_bool ASK_IP_FIB_HASH || !IP_ADVANCED_ROUTER |
bb298ca3 | 87 | |
1da177e4 LT |
88 | config IP_MULTIPLE_TABLES |
89 | bool "IP: policy routing" | |
90 | depends on IP_ADVANCED_ROUTER | |
e1ef4bf2 | 91 | select FIB_RULES |
1da177e4 LT |
92 | ---help--- |
93 | Normally, a router decides what to do with a received packet based | |
94 | solely on the packet's final destination address. If you say Y here, | |
95 | the Linux router will also be able to take the packet's source | |
96 | address into account. Furthermore, the TOS (Type-Of-Service) field | |
97 | of the packet can be used for routing decisions as well. | |
98 | ||
99 | If you are interested in this, please see the preliminary | |
100 | documentation at <http://www.compendium.com.ar/policy-routing.txt> | |
101 | and <ftp://post.tepkom.ru/pub/vol2/Linux/docs/advanced-routing.tex>. | |
102 | You will need supporting software from | |
103 | <ftp://ftp.tux.org/pub/net/ip-routing/>. | |
104 | ||
105 | If unsure, say N. | |
106 | ||
107 | config IP_ROUTE_FWMARK | |
108 | bool "IP: use netfilter MARK value as routing key" | |
109 | depends on IP_MULTIPLE_TABLES && NETFILTER | |
110 | help | |
111 | If you say Y here, you will be able to specify different routes for | |
112 | packets with different mark values (see iptables(8), MARK target). | |
113 | ||
114 | config IP_ROUTE_MULTIPATH | |
115 | bool "IP: equal cost multipath" | |
116 | depends on IP_ADVANCED_ROUTER | |
117 | help | |
118 | Normally, the routing tables specify a single action to be taken in | |
119 | a deterministic manner for a given packet. If you say Y here | |
120 | however, it becomes possible to attach several actions to a packet | |
121 | pattern, in effect specifying several alternative paths to travel | |
122 | for those packets. The router considers all these paths to be of | |
123 | equal "cost" and chooses one of them in a non-deterministic fashion | |
124 | if a matching packet arrives. | |
125 | ||
126 | config IP_ROUTE_MULTIPATH_CACHED | |
127 | bool "IP: equal cost multipath with caching support (EXPERIMENTAL)" | |
eaa1c5d0 | 128 | depends on IP_ROUTE_MULTIPATH |
1da177e4 LT |
129 | help |
130 | Normally, equal cost multipath routing is not supported by the | |
131 | routing cache. If you say Y here, alternative routes are cached | |
132 | and on cache lookup a route is chosen in a configurable fashion. | |
133 | ||
134 | If unsure, say N. | |
135 | ||
136 | config IP_ROUTE_MULTIPATH_RR | |
137 | tristate "MULTIPATH: round robin algorithm" | |
138 | depends on IP_ROUTE_MULTIPATH_CACHED | |
139 | help | |
140 | Mulitpath routes are chosen according to Round Robin | |
141 | ||
142 | config IP_ROUTE_MULTIPATH_RANDOM | |
143 | tristate "MULTIPATH: random algorithm" | |
144 | depends on IP_ROUTE_MULTIPATH_CACHED | |
145 | help | |
146 | Multipath routes are chosen in a random fashion. Actually, | |
147 | there is no weight for a route. The advantage of this policy | |
148 | is that it is implemented stateless and therefore introduces only | |
149 | a very small delay. | |
150 | ||
151 | config IP_ROUTE_MULTIPATH_WRANDOM | |
152 | tristate "MULTIPATH: weighted random algorithm" | |
153 | depends on IP_ROUTE_MULTIPATH_CACHED | |
154 | help | |
155 | Multipath routes are chosen in a weighted random fashion. | |
156 | The per route weights are the weights visible via ip route 2. As the | |
157 | corresponding state management introduces some overhead routing delay | |
158 | is increased. | |
159 | ||
160 | config IP_ROUTE_MULTIPATH_DRR | |
161 | tristate "MULTIPATH: interface round robin algorithm" | |
162 | depends on IP_ROUTE_MULTIPATH_CACHED | |
163 | help | |
164 | Connections are distributed in a round robin fashion over the | |
165 | available interfaces. This policy makes sense if the connections | |
166 | should be primarily distributed on interfaces and not on routes. | |
167 | ||
168 | config IP_ROUTE_VERBOSE | |
169 | bool "IP: verbose route monitoring" | |
170 | depends on IP_ADVANCED_ROUTER | |
171 | help | |
172 | If you say Y here, which is recommended, then the kernel will print | |
173 | verbose messages regarding the routing, for example warnings about | |
174 | received packets which look strange and could be evidence of an | |
175 | attack or a misconfigured system somewhere. The information is | |
176 | handled by the klogd daemon which is responsible for kernel messages | |
177 | ("man klogd"). | |
178 | ||
179 | config IP_PNP | |
180 | bool "IP: kernel level autoconfiguration" | |
1da177e4 LT |
181 | help |
182 | This enables automatic configuration of IP addresses of devices and | |
183 | of the routing table during kernel boot, based on either information | |
184 | supplied on the kernel command line or by BOOTP or RARP protocols. | |
185 | You need to say Y only for diskless machines requiring network | |
186 | access to boot (in which case you want to say Y to "Root file system | |
187 | on NFS" as well), because all other machines configure the network | |
188 | in their startup scripts. | |
189 | ||
190 | config IP_PNP_DHCP | |
191 | bool "IP: DHCP support" | |
192 | depends on IP_PNP | |
193 | ---help--- | |
194 | If you want your Linux box to mount its whole root file system (the | |
195 | one containing the directory /) from some other computer over the | |
196 | net via NFS and you want the IP address of your computer to be | |
197 | discovered automatically at boot time using the DHCP protocol (a | |
198 | special protocol designed for doing this job), say Y here. In case | |
199 | the boot ROM of your network card was designed for booting Linux and | |
200 | does DHCP itself, providing all necessary information on the kernel | |
201 | command line, you can say N here. | |
202 | ||
203 | If unsure, say Y. Note that if you want to use DHCP, a DHCP server | |
204 | must be operating on your network. Read | |
205 | <file:Documentation/nfsroot.txt> for details. | |
206 | ||
207 | config IP_PNP_BOOTP | |
208 | bool "IP: BOOTP support" | |
209 | depends on IP_PNP | |
210 | ---help--- | |
211 | If you want your Linux box to mount its whole root file system (the | |
212 | one containing the directory /) from some other computer over the | |
213 | net via NFS and you want the IP address of your computer to be | |
214 | discovered automatically at boot time using the BOOTP protocol (a | |
215 | special protocol designed for doing this job), say Y here. In case | |
216 | the boot ROM of your network card was designed for booting Linux and | |
217 | does BOOTP itself, providing all necessary information on the kernel | |
218 | command line, you can say N here. If unsure, say Y. Note that if you | |
219 | want to use BOOTP, a BOOTP server must be operating on your network. | |
220 | Read <file:Documentation/nfsroot.txt> for details. | |
221 | ||
222 | config IP_PNP_RARP | |
223 | bool "IP: RARP support" | |
224 | depends on IP_PNP | |
225 | help | |
226 | If you want your Linux box to mount its whole root file system (the | |
227 | one containing the directory /) from some other computer over the | |
228 | net via NFS and you want the IP address of your computer to be | |
229 | discovered automatically at boot time using the RARP protocol (an | |
230 | older protocol which is being obsoleted by BOOTP and DHCP), say Y | |
231 | here. Note that if you want to use RARP, a RARP server must be | |
232 | operating on your network. Read <file:Documentation/nfsroot.txt> for | |
233 | details. | |
234 | ||
235 | # not yet ready.. | |
236 | # bool ' IP: ARP support' CONFIG_IP_PNP_ARP | |
237 | config NET_IPIP | |
238 | tristate "IP: tunneling" | |
d2acc347 | 239 | select INET_TUNNEL |
1da177e4 LT |
240 | ---help--- |
241 | Tunneling means encapsulating data of one protocol type within | |
242 | another protocol and sending it over a channel that understands the | |
243 | encapsulating protocol. This particular tunneling driver implements | |
244 | encapsulation of IP within IP, which sounds kind of pointless, but | |
245 | can be useful if you want to make your (or some other) machine | |
246 | appear on a different network than it physically is, or to use | |
247 | mobile-IP facilities (allowing laptops to seamlessly move between | |
248 | networks without changing their IP addresses). | |
249 | ||
250 | Saying Y to this option will produce two modules ( = code which can | |
251 | be inserted in and removed from the running kernel whenever you | |
252 | want). Most people won't need this and can say N. | |
253 | ||
254 | config NET_IPGRE | |
255 | tristate "IP: GRE tunnels over IP" | |
1da177e4 LT |
256 | help |
257 | Tunneling means encapsulating data of one protocol type within | |
258 | another protocol and sending it over a channel that understands the | |
259 | encapsulating protocol. This particular tunneling driver implements | |
260 | GRE (Generic Routing Encapsulation) and at this time allows | |
261 | encapsulating of IPv4 or IPv6 over existing IPv4 infrastructure. | |
262 | This driver is useful if the other endpoint is a Cisco router: Cisco | |
263 | likes GRE much better than the other Linux tunneling driver ("IP | |
264 | tunneling" above). In addition, GRE allows multicast redistribution | |
265 | through the tunnel. | |
266 | ||
267 | config NET_IPGRE_BROADCAST | |
268 | bool "IP: broadcast GRE over IP" | |
269 | depends on IP_MULTICAST && NET_IPGRE | |
270 | help | |
271 | One application of GRE/IP is to construct a broadcast WAN (Wide Area | |
272 | Network), which looks like a normal Ethernet LAN (Local Area | |
273 | Network), but can be distributed all over the Internet. If you want | |
274 | to do that, say Y here and to "IP multicast routing" below. | |
275 | ||
276 | config IP_MROUTE | |
277 | bool "IP: multicast routing" | |
278 | depends on IP_MULTICAST | |
279 | help | |
280 | This is used if you want your machine to act as a router for IP | |
281 | packets that have several destination addresses. It is needed on the | |
282 | MBONE, a high bandwidth network on top of the Internet which carries | |
283 | audio and video broadcasts. In order to do that, you would most | |
284 | likely run the program mrouted. Information about the multicast | |
285 | capabilities of the various network cards is contained in | |
286 | <file:Documentation/networking/multicast.txt>. If you haven't heard | |
287 | about it, you don't need it. | |
288 | ||
289 | config IP_PIMSM_V1 | |
290 | bool "IP: PIM-SM version 1 support" | |
291 | depends on IP_MROUTE | |
292 | help | |
293 | Kernel side support for Sparse Mode PIM (Protocol Independent | |
294 | Multicast) version 1. This multicast routing protocol is used widely | |
295 | because Cisco supports it. You need special software to use it | |
296 | (pimd-v1). Please see <http://netweb.usc.edu/pim/> for more | |
297 | information about PIM. | |
298 | ||
299 | Say Y if you want to use PIM-SM v1. Note that you can say N here if | |
300 | you just want to use Dense Mode PIM. | |
301 | ||
302 | config IP_PIMSM_V2 | |
303 | bool "IP: PIM-SM version 2 support" | |
304 | depends on IP_MROUTE | |
305 | help | |
306 | Kernel side support for Sparse Mode PIM version 2. In order to use | |
307 | this, you need an experimental routing daemon supporting it (pimd or | |
308 | gated-5). This routing protocol is not used widely, so say N unless | |
309 | you want to play with it. | |
310 | ||
311 | config ARPD | |
312 | bool "IP: ARP daemon support (EXPERIMENTAL)" | |
6a2e9b73 | 313 | depends on EXPERIMENTAL |
1da177e4 LT |
314 | ---help--- |
315 | Normally, the kernel maintains an internal cache which maps IP | |
316 | addresses to hardware addresses on the local network, so that | |
317 | Ethernet/Token Ring/ etc. frames are sent to the proper address on | |
318 | the physical networking layer. For small networks having a few | |
319 | hundred directly connected hosts or less, keeping this address | |
320 | resolution (ARP) cache inside the kernel works well. However, | |
321 | maintaining an internal ARP cache does not work well for very large | |
322 | switched networks, and will use a lot of kernel memory if TCP/IP | |
323 | connections are made to many machines on the network. | |
324 | ||
325 | If you say Y here, the kernel's internal ARP cache will never grow | |
326 | to more than 256 entries (the oldest entries are expired in a LIFO | |
327 | manner) and communication will be attempted with the user space ARP | |
328 | daemon arpd. Arpd then answers the address resolution request either | |
329 | from its own cache or by asking the net. | |
330 | ||
331 | This code is experimental and also obsolete. If you want to use it, | |
332 | you need to find a version of the daemon arpd on the net somewhere, | |
333 | and you should also say Y to "Kernel/User network link driver", | |
334 | below. If unsure, say N. | |
335 | ||
336 | config SYN_COOKIES | |
337 | bool "IP: TCP syncookie support (disabled per default)" | |
1da177e4 LT |
338 | ---help--- |
339 | Normal TCP/IP networking is open to an attack known as "SYN | |
340 | flooding". This denial-of-service attack prevents legitimate remote | |
341 | users from being able to connect to your computer during an ongoing | |
342 | attack and requires very little work from the attacker, who can | |
343 | operate from anywhere on the Internet. | |
344 | ||
345 | SYN cookies provide protection against this type of attack. If you | |
346 | say Y here, the TCP/IP stack will use a cryptographic challenge | |
347 | protocol known as "SYN cookies" to enable legitimate users to | |
348 | continue to connect, even when your machine is under attack. There | |
349 | is no need for the legitimate users to change their TCP/IP software; | |
350 | SYN cookies work transparently to them. For technical information | |
351 | about SYN cookies, check out <http://cr.yp.to/syncookies.html>. | |
352 | ||
353 | If you are SYN flooded, the source address reported by the kernel is | |
354 | likely to have been forged by the attacker; it is only reported as | |
355 | an aid in tracing the packets to their actual source and should not | |
356 | be taken as absolute truth. | |
357 | ||
358 | SYN cookies may prevent correct error reporting on clients when the | |
359 | server is really overloaded. If this happens frequently better turn | |
360 | them off. | |
361 | ||
362 | If you say Y here, note that SYN cookies aren't enabled by default; | |
363 | you can enable them by saying Y to "/proc file system support" and | |
364 | "Sysctl support" below and executing the command | |
365 | ||
366 | echo 1 >/proc/sys/net/ipv4/tcp_syncookies | |
367 | ||
368 | at boot time after the /proc file system has been mounted. | |
369 | ||
370 | If unsure, say N. | |
371 | ||
372 | config INET_AH | |
373 | tristate "IP: AH transformation" | |
1da177e4 LT |
374 | select XFRM |
375 | select CRYPTO | |
376 | select CRYPTO_HMAC | |
377 | select CRYPTO_MD5 | |
378 | select CRYPTO_SHA1 | |
379 | ---help--- | |
380 | Support for IPsec AH. | |
381 | ||
382 | If unsure, say Y. | |
383 | ||
384 | config INET_ESP | |
385 | tristate "IP: ESP transformation" | |
1da177e4 LT |
386 | select XFRM |
387 | select CRYPTO | |
388 | select CRYPTO_HMAC | |
389 | select CRYPTO_MD5 | |
6b7326c8 | 390 | select CRYPTO_CBC |
1da177e4 LT |
391 | select CRYPTO_SHA1 |
392 | select CRYPTO_DES | |
393 | ---help--- | |
394 | Support for IPsec ESP. | |
395 | ||
396 | If unsure, say Y. | |
397 | ||
398 | config INET_IPCOMP | |
399 | tristate "IP: IPComp transformation" | |
1da177e4 | 400 | select XFRM |
d2acc347 | 401 | select INET_XFRM_TUNNEL |
1da177e4 LT |
402 | select CRYPTO |
403 | select CRYPTO_DEFLATE | |
404 | ---help--- | |
405 | Support for IP Payload Compression Protocol (IPComp) (RFC3173), | |
406 | typically needed for IPsec. | |
407 | ||
408 | If unsure, say Y. | |
409 | ||
d2acc347 HX |
410 | config INET_XFRM_TUNNEL |
411 | tristate | |
412 | select INET_TUNNEL | |
413 | default n | |
414 | ||
1da177e4 | 415 | config INET_TUNNEL |
d2acc347 HX |
416 | tristate |
417 | default n | |
1da177e4 | 418 | |
b59f45d0 HX |
419 | config INET_XFRM_MODE_TRANSPORT |
420 | tristate "IP: IPsec transport mode" | |
421 | default y | |
422 | select XFRM | |
423 | ---help--- | |
424 | Support for IPsec transport mode. | |
425 | ||
426 | If unsure, say Y. | |
427 | ||
428 | config INET_XFRM_MODE_TUNNEL | |
429 | tristate "IP: IPsec tunnel mode" | |
430 | default y | |
431 | select XFRM | |
432 | ---help--- | |
433 | Support for IPsec tunnel mode. | |
434 | ||
435 | If unsure, say Y. | |
436 | ||
17b085ea ACM |
437 | config INET_DIAG |
438 | tristate "INET: socket monitoring interface" | |
1da177e4 LT |
439 | default y |
440 | ---help--- | |
73c1f4a0 ACM |
441 | Support for INET (TCP, DCCP, etc) socket monitoring interface used by |
442 | native Linux tools such as ss. ss is included in iproute2, currently | |
443 | downloadable at <http://developer.osdl.org/dev/iproute2>. | |
1da177e4 LT |
444 | |
445 | If unsure, say Y. | |
446 | ||
17b085ea ACM |
447 | config INET_TCP_DIAG |
448 | depends on INET_DIAG | |
449 | def_tristate INET_DIAG | |
450 | ||
3d2573f7 | 451 | menuconfig TCP_CONG_ADVANCED |
a6484045 | 452 | bool "TCP: advanced congestion control" |
a6484045 DM |
453 | ---help--- |
454 | Support for selection of various TCP congestion control | |
455 | modules. | |
456 | ||
457 | Nearly all users can safely say no here, and a safe default | |
597811ec | 458 | selection will be made (CUBIC with new Reno as a fallback). |
a6484045 DM |
459 | |
460 | If unsure, say N. | |
461 | ||
3d2573f7 | 462 | if TCP_CONG_ADVANCED |
83803034 SH |
463 | |
464 | config TCP_CONG_BIC | |
465 | tristate "Binary Increase Congestion (BIC) control" | |
597811ec | 466 | default m |
83803034 SH |
467 | ---help--- |
468 | BIC-TCP is a sender-side only change that ensures a linear RTT | |
469 | fairness under large windows while offering both scalability and | |
470 | bounded TCP-friendliness. The protocol combines two schemes | |
471 | called additive increase and binary search increase. When the | |
472 | congestion window is large, additive increase with a large | |
473 | increment ensures linear RTT fairness as well as good | |
474 | scalability. Under small congestion windows, binary search | |
475 | increase provides TCP friendliness. | |
476 | See http://www.csc.ncsu.edu/faculty/rhee/export/bitcp/ | |
477 | ||
df3271f3 SH |
478 | config TCP_CONG_CUBIC |
479 | tristate "CUBIC TCP" | |
597811ec | 480 | default y |
df3271f3 SH |
481 | ---help--- |
482 | This is version 2.0 of BIC-TCP which uses a cubic growth function | |
483 | among other techniques. | |
484 | See http://www.csc.ncsu.edu/faculty/rhee/export/bitcp/cubic-paper.pdf | |
485 | ||
87270762 SH |
486 | config TCP_CONG_WESTWOOD |
487 | tristate "TCP Westwood+" | |
87270762 SH |
488 | default m |
489 | ---help--- | |
490 | TCP Westwood+ is a sender-side only modification of the TCP Reno | |
491 | protocol stack that optimizes the performance of TCP congestion | |
492 | control. It is based on end-to-end bandwidth estimation to set | |
493 | congestion window and slow start threshold after a congestion | |
494 | episode. Using this estimation, TCP Westwood+ adaptively sets a | |
495 | slow start threshold and a congestion window which takes into | |
496 | account the bandwidth used at the time congestion is experienced. | |
497 | TCP Westwood+ significantly increases fairness wrt TCP Reno in | |
498 | wired networks and throughput over wireless links. | |
499 | ||
a7868ea6 BE |
500 | config TCP_CONG_HTCP |
501 | tristate "H-TCP" | |
a7868ea6 BE |
502 | default m |
503 | ---help--- | |
504 | H-TCP is a send-side only modifications of the TCP Reno | |
505 | protocol stack that optimizes the performance of TCP | |
506 | congestion control for high speed network links. It uses a | |
507 | modeswitch to change the alpha and beta parameters of TCP Reno | |
508 | based on network conditions and in a way so as to be fair with | |
509 | other Reno and H-TCP flows. | |
510 | ||
a628d29b JH |
511 | config TCP_CONG_HSTCP |
512 | tristate "High Speed TCP" | |
6a2e9b73 | 513 | depends on EXPERIMENTAL |
a628d29b JH |
514 | default n |
515 | ---help--- | |
516 | Sally Floyd's High Speed TCP (RFC 3649) congestion control. | |
517 | A modification to TCP's congestion control mechanism for use | |
518 | with large congestion windows. A table indicates how much to | |
519 | increase the congestion window by when an ACK is received. | |
520 | For more detail see http://www.icir.org/floyd/hstcp.html | |
521 | ||
835b3f0c DL |
522 | config TCP_CONG_HYBLA |
523 | tristate "TCP-Hybla congestion control algorithm" | |
6a2e9b73 | 524 | depends on EXPERIMENTAL |
835b3f0c DL |
525 | default n |
526 | ---help--- | |
527 | TCP-Hybla is a sender-side only change that eliminates penalization of | |
528 | long-RTT, large-bandwidth connections, like when satellite legs are | |
44c09201 | 529 | involved, especially when sharing a common bottleneck with normal |
835b3f0c DL |
530 | terrestrial connections. |
531 | ||
b87d8561 SH |
532 | config TCP_CONG_VEGAS |
533 | tristate "TCP Vegas" | |
6a2e9b73 | 534 | depends on EXPERIMENTAL |
b87d8561 SH |
535 | default n |
536 | ---help--- | |
537 | TCP Vegas is a sender-side only change to TCP that anticipates | |
538 | the onset of congestion by estimating the bandwidth. TCP Vegas | |
539 | adjusts the sending rate by modifying the congestion | |
540 | window. TCP Vegas should provide less packet loss, but it is | |
541 | not as aggressive as TCP Reno. | |
542 | ||
0e57976b JH |
543 | config TCP_CONG_SCALABLE |
544 | tristate "Scalable TCP" | |
6a2e9b73 | 545 | depends on EXPERIMENTAL |
0e57976b JH |
546 | default n |
547 | ---help--- | |
548 | Scalable TCP is a sender-side only change to TCP which uses a | |
549 | MIMD congestion control algorithm which has some nice scaling | |
550 | properties, though is known to have fairness issues. | |
551 | See http://www-lce.eng.cam.ac.uk/~ctk21/scalable/ | |
a7868ea6 | 552 | |
7c106d7e WHSE |
553 | config TCP_CONG_LP |
554 | tristate "TCP Low Priority" | |
555 | depends on EXPERIMENTAL | |
556 | default n | |
557 | ---help--- | |
558 | TCP Low Priority (TCP-LP), a distributed algorithm whose goal is | |
cab00891 | 559 | to utilize only the excess network bandwidth as compared to the |
7c106d7e WHSE |
560 | ``fair share`` of bandwidth as targeted by TCP. |
561 | See http://www-ece.rice.edu/networks/TCP-LP/ | |
562 | ||
76f10177 BZ |
563 | config TCP_CONG_VENO |
564 | tristate "TCP Veno" | |
565 | depends on EXPERIMENTAL | |
566 | default n | |
567 | ---help--- | |
568 | TCP Veno is a sender-side only enhancement of TCP to obtain better | |
569 | throughput over wireless networks. TCP Veno makes use of state | |
570 | distinguishing to circumvent the difficult judgment of the packet loss | |
571 | type. TCP Veno cuts down less congestion window in response to random | |
572 | loss packets. | |
573 | See http://www.ntu.edu.sg/home5/ZHOU0022/papers/CPFu03a.pdf | |
574 | ||
3d2573f7 SH |
575 | choice |
576 | prompt "Default TCP congestion control" | |
597811ec | 577 | default DEFAULT_CUBIC |
3d2573f7 SH |
578 | help |
579 | Select the TCP congestion control that will be used by default | |
580 | for all connections. | |
581 | ||
582 | config DEFAULT_BIC | |
583 | bool "Bic" if TCP_CONG_BIC=y | |
584 | ||
585 | config DEFAULT_CUBIC | |
586 | bool "Cubic" if TCP_CONG_CUBIC=y | |
587 | ||
588 | config DEFAULT_HTCP | |
589 | bool "Htcp" if TCP_CONG_HTCP=y | |
590 | ||
591 | config DEFAULT_VEGAS | |
592 | bool "Vegas" if TCP_CONG_VEGAS=y | |
593 | ||
594 | config DEFAULT_WESTWOOD | |
595 | bool "Westwood" if TCP_CONG_WESTWOOD=y | |
596 | ||
597 | config DEFAULT_RENO | |
598 | bool "Reno" | |
599 | ||
600 | endchoice | |
601 | ||
602 | endif | |
83803034 | 603 | |
597811ec | 604 | config TCP_CONG_CUBIC |
6c360767 | 605 | tristate |
a6484045 DM |
606 | depends on !TCP_CONG_ADVANCED |
607 | default y | |
608 | ||
3d2573f7 SH |
609 | config DEFAULT_TCP_CONG |
610 | string | |
611 | default "bic" if DEFAULT_BIC | |
612 | default "cubic" if DEFAULT_CUBIC | |
613 | default "htcp" if DEFAULT_HTCP | |
614 | default "vegas" if DEFAULT_VEGAS | |
615 | default "westwood" if DEFAULT_WESTWOOD | |
616 | default "reno" if DEFAULT_RENO | |
597811ec | 617 | default "cubic" |
3d2573f7 | 618 | |
1da177e4 LT |
619 | source "net/ipv4/ipvs/Kconfig" |
620 |