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4cc78c5082
interface since it makes much trouble everywhere. Instead, we understand secondary addresses as subinterfaces. - In case interface addresses or basic flags change, we simply convert it to a down/up sequence. - Implemented the universal neighbour cache. (Just forget what did previous includes say of neighbour caching, this one is brand new.)
86 lines
2.6 KiB
Plaintext
86 lines
2.6 KiB
Plaintext
Core
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* router id
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- fake multipath?
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- config file: symbolic constants?
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- counters (according to SNMP MIB?)
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- generation of subnet mask ICMP's for v6?
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- ipv4: recognize site scope addresses?
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- ifdef out some debugging code?
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- better memory allocators
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- default preferences of protocols: prefer BGP over OSPF/RIP external routes?
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- all internal tables are in host order
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- secondary addresses -> subinterfaces
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- filter: logging of dropped routes (?)
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- limitation of memory consumption: per-process and total (?)
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- alloca
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- adding of route: clear all bits not covered by masklen
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- switch: generate default route only if at least one BGP connection exists
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- "interface kill" list
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- route recalculation timing + flap dampening (?)
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- reconfiguration without restart of all protocols?
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- change of interface address: ??? (down and up?)
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- "generate default route" switch for all IGP's
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- running protocol on an interface:
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- interface is not required to exist
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- can specify a wildcard pattern or an interface list
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- re-configuration: restart of routing protocols (shutdown mode)
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- Check incoming packets and log errors!!
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RIP
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~~~
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- RIP: export-only and import-only mode?
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- drop RIPv1 (Historic protocol)?
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- Route Tag
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- limit routing table xfer (frequency, only to neighbors)
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- multicast on/off
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- remember routes for all neighbors?
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OSPF
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~~~~
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- Dijkstra: use Fibonacci heaps?
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- point-to-point interface with address: advertise as stub network
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- static routes: stub networks?
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- modes: PtP, PtP-unnumbered, Broadcast, NBMA, point-to-multipoint
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- importing of device routes for networks where we don't run OSPF
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- tie breaking for equal type 2 ext metrics by using internal (type 1) metric
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- SPF tree recalc timing (per-area timers?)
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- aggregation: specify network list for each area
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- stub area: either no external routes or only default route
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- automatic generation of external route tags (RFC1403)
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BGP
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~~~
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- in, local, out RIB
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- maxsize=4096
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- BGP identifier aka router id
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- detection of loops
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- aggregation, ATOMIC_AGGREGATE
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- communities
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- confederations
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- attributes must be sorted!
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- re-export of NEXT_HOP attribute
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- BGP session over currently down interface
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- route flap dampening?
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- LOCAL_PREF attribute
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- error notification received -> log error
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- set TTL to 1 (configurable?)
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- consulting IGP for next-hop information? (what if it changes?)
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- inter-advertisement delay???!
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- normalize (sort) incoming AS-SET's
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- maximum length of AS paths
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- expected neighbor AS
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- hold time
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- idle timer after error: initial value, exponential growth, maximum value
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- import of IGP routes (use external route tags from OSPF)
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