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NEWS
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GNU Zebra is not yet released, so this NEWS is about beta version.
* Changes in zebra-0.95
* Changes in zebra
** IRDP support is added.
* Changes in ripd
** Set receive UDP socket buffer to large value.
* Changes in ospfd
** Fix problem of OpenBSD-3.4 IP header length treatment.
* Changes in ospf6d
** Area support is added.
* Changes in bgpd
** Old commands are removed
"show ipv6 summary"
"show ipv6 mbgp summary"
** New ospf6d implementation is introduced. This is rewrite of whole
ospf6d code to make it far much better than old code.
* Changes in vtysh
** Many bugs and problems are fixed. All of user of vtysh should
update to zebra-0.95.
* Changes in zebra-0.94
* Changes in zebra
** Do not listen other process's netlink message.
* Changes in bgpd
** "bgp log-neighbor-changes" is added.
** "set ip next-hop peer-address" is added.
** Community delete bug is fixed.
** Fix bug of router-id display
** Option parameter length bug is fixed.
* Chages in ospfd
** Point-to-Multipoint support.
** OSPF MD5 authentication bug is fixed.
** OSPF NSSA bug is fixed.
** NSM event schedule bug is fixed.
** Update Opaque LSA patch.
** When write queue becomes empty stop write timer.
* Changes in ospf6d
** Update to the latest Ohara's code.
** DR election bug is fixed.
** Update link-local address on interface creation
* Changes in vtysh
** Update for IPv6 handling
** Make all protocol DEFUN/ALIAS consistent
* Changes in lib
** Fix route-map problem
** Fix vty bug cause daemon crash.
* Changes in zebra-0.93
* Changes in bgpd
** Configuration is changed to new format.
* Changes in ospfd
** Crush bugs which reported on Zebra ML is fixed.
** Opaque LSA and TE LSA support is added by KDD R&D Laboratories,
Inc.
* Chages in ospf6d
** Many bugs are fixed.
* Changes in zebra-0.92a
* Changes in bgpd
** Fix "^$" community list bug.
** Below command's Address Family specific configurations are added
nexthop-self
route-reflector-client
route-server-client
soft-reconfiguration inbound
* Changes in zebra
** Treat kernel type routes as EGP routes.
* Changes in zebra-0.92
** Overall security is improved. Default umask is 0077.
* Changes in ripd
** If output interface is in simple password authentication mode,
substruct one from rtemax.
* Changes in bgpd
** IPv4 multicast and IPv6 unicast configuration is changed to so
called new config. All of AFI and SAFI specific configuration is
moved to "address-family" node. When you have many IPv6 only
configuration, you will see many "no neighbor X:X::X:X activate" line
in your configuration to disable IPv4 unicast NLRI exchange. In that
case please use "no bgp default ipv4-unicast" command to suppress the
output. Until zebra-0.93, old config is still left for compatibility.
Old config
==========
router bgp 7675
bgp router-id 10.0.0.1
redistribute connected
network 192.168.0.0/24
neighbor 10.0.0.2 remote-as 7675
ipv6 bgp network 3ffe:506::/33
ipv6 bgp network 3ffe:1800:e800::/40
ipv6 bgp aggregate-address 3ffe:506::/32
ipv6 bgp redistribute connected
ipv6 bgp neighbor 3ffe:506:1000::2 remote-as 1
New config
==========
router bgp 7675
bgp router-id 10.0.0.1
network 192.168.0.0/24
redistribute connected
neighbor 10.0.0.2 remote-as 7675
neighbor 3ffe:506:1000::2 remote-as 1
no neighbor 3ffe:506:1000::2 activate
!
address-family ipv6
network 3ffe:506::/33
network 3ffe:1800:e800::/40
aggregate-address 3ffe:506::/32
redistribute connected
neighbor 3ffe:506:1000::2 activate
exit-address-family
* Changes in ospfd
** Internal interface treatment is changed. Now ospfd can handle
multiple IP address for an interface.
** Redistribution of loopback interface's address works fine.
* Changes in zebra-0.91
** --enable-oldrib configure option is removed.
** HAVE_IF_PSEUDO part is removed. Same feature is now supported by
default.
* Changes in ripd
** When redistributed route is withdrawn, perform poisoned reverse.
* Changes in zebra
** When interface's address is removed, kernel route pointing out to
the address is removed.
** IPv6 RIB is now based upon new RIB code.
** zebra can handle same connected route to one interface.
** New command for interface address. Currently this commands are
only supported on GNU/Linux with netlink interface.
"ip address A.B.C.D secondary"
"ip address A.B.C.D label LABEL"
* Changes in bgpd
** BGP flap dampening bugs are fixed.
** BGP non-blocking TCP connection bug is fixed.
** "show ip bgp summary" shows AS path and community entry number.
** New commands have been added.
"show ip bgp cidr-only"
"show ip bgp ipv4 (unicast|multicast) cidr-only"
"show ip bgp A.B.C.D/M longer-prefixes"
"show ip bgp ipv4 (unicast|multicast) A.B.C.D/M longer-prefixes"
"show ipv6 bgp X:X::X:X/M longer-prefixes"
"show ipv6 mbgp X:X::X:X/M longer-prefixes"
** IPv6 IBGP nexthop change is monitored.
** Unknown transitive attribute is passed with partial flag bit on.
* Changes in ospfd
** Fix bug of LSA MaxAge flood.
** Fix bug of NSSA codes.
* Changes in zebra-0.90
** From this beta release, --enable-unixdomain and --enable-newrib
becomes default. So both options are removed from configure.in. To
revert old behavior please specify below option.
--enable-tcp-zebra # TCP/IP socket is used for protocol daemon and zebra.
--enable-oldrib # Turn on old RIB implementation.
Old RIB implementation will be removed in zebra-0.91.
** From this beta release --enable-multipath is supported. This
option is only effective on GNU/Linux kernel with
CONFIG_IP_ADVANCED_ROUTER and CONFIG_IP_ROUTE_MULTIPATH is set.
--enable-multipath=ARG # ARG must be digit. When ARG is 0 unlimit multipath number.
** From this release we do not include guile files.
* Changes in lib
** newlist.[ch] is merged with linklist.[ch].
** Now Zebra works on MacOS X public beta.
** Access-list can have remark. "access-list WORD remark LINE" define
remark for specified access-list.
** Key of key-chain is sorted by it's idetifier value.
** prefix-list rule is slightly changed. The rule of "len <= ge-value
<= le-value" is changed to "len < ge-value <= le-value".
** According to above prefix-list rule change, add automatic
conversion function of an old rule. ex.) 10.0.0.0/8 ge 8 -> 10.0.0.0/8
le 32
** SMUX can handle SNMP trap.
** In our event library, event thread is executed before any other
thread like timer, read and write event.
** Robust method for writing configuration file and recover from
backing up config file.
** Display "end" at the end of configuration.
** Fix memory leak in vtysh_read().
** Fix memroy leak about access-list and prefix-list name.
* Changes in zebra
** UNIX domain socket server of zebra protocol is added.
** Fix PointoPoint interface network bug. The destination network
should be installed into routing table instead of local network.
** Metric value is reflected to kernel routing table.
** "show ip route" display uptime of RIP,OSPF,BGP routes.
** New RIB implementation is added.
Now we have enhanced RIB (routing information base) implementation in
zebra. New RIB has many new features and fixed some bugs which exist
in old RIB code.
*** Static route with distance value
Static route can be specified with administrative distance. The
distance value 255 means it is not installed into the kernel.
Default value of distance for static route is 1.
ip route A.B.C.D/M A.B.C.D <1-255>
ip route A.B.C.D/M IFNAME <1-255>
If the least distance value's route's nexthop are unreachable,
select the least distance value route which has reachable nexthop is
selected.
ip route 0.0.0.0/0 10.0.0.1
ip route 0.0.0.0/0 11.0.0.1 2
In this case, when 10.0.0.1 is unreachable and 11.0.0.1 is
reachable. The route with nexthop 11.0.0.1 will be installed into
forwarding table.
zebra> show ip route
S>* 0.0.0.0/0 [2/0] via 11.0.0.1
S 0.0.0.0/0 [1/0] via 10.0.0.1 inactive
If the nexthop is unreachable "inactive" is displayed. You can
specify any string to IFNAME. There is no need of the interface is
there when you configure the route.
ip route 1.1.1.1/32 ppp0
When ppp0 comes up, the route is installed properly.
*** Multiple nexthop routes for one prefix
Multiple nexthop routes can be specified for one prefix. Even the
kernel support only one nexthop for one prefix user can configure
multiple nexthop.
When you configure routes like below, prefix 10.0.0.1 has three
nexthop.
ip route 10.0.0.1/32 10.0.0.2
ip route 10.0.0.1/32 10.0.0.3
ip route 10.0.0.1/32 eth0
If there is no route to 10.0.0.2 and 10.0.0.3. And interface eth0
is reachable, then the last route is installed into the kernel.
zebra> show ip route
S> 10.0.0.1/32 [1/0] via 10.0.0.2 inactive
via 10.0.0.3 inactive
* is directly connected, eth0
'*' means this nexthop is installed into the kernel.
*** Multipath (more than one nexthop for one prefix) can be installed into the kernel.
When the kernel support multipath, zebra can install multipath
routes into the kernel. Before doing that please make it sure that
setting --enable-multipath=ARG to configure script. ARG must be digit
value. When specify 0 to ARG, there is no limitation of the number
of the multipath. Currently only GNU/Linux with netlink interface is
supported.
ip route 10.0.0.1/32 10.0.0.2
ip route 10.0.0.1/32 10.0.0.3
ip route 10.0.0.1/32 eth0
zebra> show ip route
S>* 10.0.0.1/32 [1/0] via 10.0.0.2
* via 10.0.0.3
is directly connected, eth0
*** Kernel message delete installed route.
After zebra install static or dynamic route into the kernel.
R>* 0.0.0.0/0 [120/3] via 10.0.0.1
If you delete this route outside zebra, old zebra does not reinstall
route again. Now the route is re-processed and properly reinstall the
static or dynamic route into the kernel.
** GNU/Linux netlink socket handling is improved to fix race condition
between kernel message and user command responce.
* Changes in bgpd
** Add show neighbor's routes command.
"show ip bgp neighbors (A.B.C.D|X:X::X:X) routes"
"show ip bgp ipv4 (unicast|multicast) neighbors (A.B.C.D|X:X::X:X) routes"
"show ipv6 bgp neighbors (A.B.C.D|X:X::X:X) routes"
"show ipv6 mbgp neighbors (A.B.C.D|X:X::X:X) routes"
** BGP passive peer support problem is fixed.
** Redistributed IGP nexthop is passed to BGP nexthop.
** On multiaccess media, if the nexthop is reachable nexthop is passed
as it is.
** Remove zebra-0.88 compatibility commands.
"match ip prefix-list WORD"
"match ipv6 prefix-list WORD"
Instead of above please use below commands.
"match ip address prefix-list WORD"
"match ipv6 address prefix-list WORD"
** Fix bug of holdtimer is not reset when bgp cleared.
** "show ip bgp summary" display peer establish/drop count.
** Change "match ip next-hop" argument from IP address to access-list
name.
** When "bgp enforce-first-as" is enabled, check EBGP peer's update
has it's AS number in the first AS number in AS sequence.
** New route-map command "set community-delete COMMUNITY-LIST" is
added. Community matched the CoMMUNITY-LIST is removed from the
community.
** BGP-MIB implementation is finished.
** When BGP connection comes from unconfigured IP address, close
socket immediately.
** Do not compare router ID when the routes comes from EBGP peer.
When originator ID is same, take shorter cluster-list route. If
cluster-list is same take smaller IP address neighbor's route.
** Add "bgp bestpath as-path ignore" command. When this option is
set, do not concider AS path length when route selection.
** Add "bgp bestpath compare-routerid". When this option is set,
compare router ID when the routes comes from EBGP peer.
** Add "bgp deterministic-med" process.
** BGP flap dampening feature is added.
** When IBGP nexthop is changed, it is reflected to RIB.
** Change "neighbor route-refresh" command to "neighbor capability
route-refresh".
* Changes in ripd
** Change "match ip next-hop" argument from IP address to access-list
name.
** "no ip rip (send|receive)" command accept version number argument.
** Memory leak related classfull network generation is fixed.
** When a route is in garbage collection process (invalid with metric
16) and a router receives the same route with valid metric then route
was not installed into zebra rib, but only into ripd rib. Moreover ,
it will never get into zebra rib, because ripd wrongly assumes it's
already there.
* Change in ospfd
** Fix bug of refreshing default route.
** --enable-nssa turn on undergoing NSSA feature.
** Fix bug of Hello packet's option is not properly set when interface
comes up.
** Reduce unconditional logging.
** Add nexthop to OSPF path only when it is not there.
** When there is no DR on network (suppose you have only one router
with interface priority 0). It's router LSA does not contain the link
information about this network.
** When you change a priority of interface from/to 0
ISM_NeighborChange event should be scheduled in order to elect new
DR/BDR on the network.
** When we add some LSA into retransmit list we need to check whether
the present old LSA in retransmit list is not more recent than the new
one.
** In states Loading and Full the slave must resend its last Database
Description packet in response to duplicate Database Description
packets received from the master. For this reason the slave must wait
RouterDeadInterval seconds before freeing the last Database
Description packet. Reception of a Database Description packet from
the master after this interval will generate a SeqNumberMismatch
neighbor event. RFC2328 Section 10.8
** Virtual link can not configured in stub area.
** Clear a ls_upd_queue queue of the interface when interface goes
down.
** "no router ospf" unregister redistribution requests from zebra.
** New command for virtual-link configuration is added.
"area A.B.C.D virtual-link A.B.C.D"
"area A.B.C.D virtual-link A.B.C.D hello-interval <1-65535> retransmit-interval <3-65535> transmit-delay <1-65535> dead-interval <1-65535>"
"area A.B.C.D virtual-link A.B.C.D hello-interval <1-65535> retransmit-interval <3-65535> transmit-delay <1-65535> dead-interval <1-65535> authentication-key AUTH_KEY"
"area A.B.C.D virtual-link A.B.C.D authentication-key AUTH_KEY"
"area A.B.C.D virtual-link A.B.C.D hello-interval <1-65535> retransmit-interval <3-65535> transmit-delay <1-65535> dead-interval <1-65535> message-digest-key <1-255> md5 KEY"
"area A.B.C.D virtual-link A.B.C.D message-digest-key <1-255> md5 KEY"
** Clear cryptographic sequence number when neighbor status is changed
to NSM down.
** Make Summary LSA's origination and refreshment as same as other
type of LSA.
** New OSPF pakcet read method. Now maximum packet length may be 65535
bytes (maximum IP packet length).
** Checking the age of the found LSA and if the LSA is MAXAGE we
should call refresh instead of originate.
** Install multipath information to zebra.
** Fix socket descriptor leak when system call failed.
* Changes in ospf6d
** Whole functionality has been rewritten as new code. new command
"show ipv6 ospf6 spf node", "show ipv6 ospf6 spf tree", "show ipv6
ospf6 spf table" has been added.
** Change to do not send garbage route whose nexthop is not linklocal
address.
** "redistribute ospf6" was generated in "router ospf6" in config
file. It is fixed.
** LSDB sync bug is fixed.
** Fix bug of using unavailable route.
* Changes in vtysh
** route-map and access-list configuration is merged into one
configuration.
** /usr/local/etc/Zebra.conf is integrated configuration file. "write
memory" in vtysh will write whole configuration to this file.
** When -b option is specified to vtysh, vtysh read
/usr/local/etc/Zebra.conf file then pass the confuguration to proper
protocol daemon. So make all protocol daemon's configuration file
empty then invoke all daemon. After that vtysh -b will setup saved
configuration.
zebrastart.sh
=============
/usr/local/sbin/zebra -d
/usr/local/sbin/ripd -d
/usr/local/sbin/ospfd -d
/usr/local/sbin/bgpd -d
/usr/local/bin/vtysh -b
* Changes in zebra-0.89
* Changes in lib
** distribute-list can set all interface's access-list and prefix-list
configuration.
* Changes in ripd
** "show ip protocols" display proper distribute-list settings and
distance settings.
** When metric infinity route received withdraw the route from kernel
immediately it used to be wait garbage collection.
** key-chain can be used for simple password authentication.
** RIPv2 MIB getnext interface bug is fixed.
* Changes in vtysh
** --with-libpam enable PAM authentication for vtysh.
** Now vtysh read vtysh.conf. This file should be
${SYSCONFDIR}/etc/vtysh.conf for security reason. Usually it is
/usr/local/etc/vtysh.conf.
** "username WORD nopassword" command is added to vtysh.
* Chagees in ospfd
** NBMA interface support is added.
** OSPF area is sorted by area ID.
** New implementation of OSPF refreesh.
** OSPF-MIB read function is partly added.
* Changes in bgpd
** When the peering is done by ebgp-multihop, nexthop is looked up
like IBGP routes.
** "show ip mbgp" commands are changed to "show ip bgp ipv4
multicast".
** New terminal commands are added.
"show ip bgp ipv4 (unicast|multicast) filter-list WORD"
"show ip bgp ipv4 (unicast|multicast) community"
"show ip bgp ipv4 (unicast|multicast) community-list WORD"
"show ip bgp ipv4 (unicast|multicast) community-list WORD exact-match"
** MBGP soft-reconfiguration command is added.
"clear ip bgp x.x.x.x ipv4 (unicast|multicast) in"
"clear ip bgp x.x.x.x ipv4 (unicast|multicast) out"
"clear ip bgp x.x.x.x ipv4 (unicast|multicast) soft"
"clear ip bgp <1-65535> ipv4 (unicast|multicast) in"
"clear ip bgp <1-65535> ipv4 (unicast|multicast) out"
"clear ip bgp <1-65535> ipv4 (unicast|multicast) soft"
"clear ip bgp * ipv4 (unicast|multicast) in"
"clear ip bgp * ipv4 (unicast|multicast) out"
"clear ip bgp * ipv4 (unicast|multicast) soft"
** MED related commands are added.
"bgp deterministic-med"
"bgp bestpath med confed"
"bgp bestpath med missing-as-worst"
** "bgp default local-preference" command is added.
** BGP confederation peer's routes are passed to zebra like IBGP route.
** Community match command is added.
"show ip bgp community <val>"
"show ip bgp community <val> exact-match"
** EBGP multihop route treatment bug is fixed. Now nexthop is
resolved by IGP routes.
** Some commands are added to show routes by filter-list and community
value.
"show ip bgp ipv4 (unicast|multicast) filter-list WORD"
"show ip bgp ipv4 (unicast|multicast) community"
"show ip bgp ipv4 (unicast|multicast) community-list WORD"
"show ip bgp ipv4 (unicast|multicast) community-list WORD exact-match"
* Changes in zebra
** zebra read interface's address information using getifaddrs() when
it is available.
** Reflect IPv6 interface's address change to protocol daemons.
* Changes in zebra-0.88
* Changes in lib
** "exact-match" option is added to "access-list" and "ipv6
access-list" command. If this option is specified, the prefix and
prefix length is compared as exact match mode.
* Changes in zebra
** New Zebra message ZEBRA_REDISTRIBUTE_DEFAULT_ADD and
ZEBRA_REDISTRIBUTE_DEFAULT_DELTE are added.
** Default administrative distance value is changed.
Old New
------------------------------------------
system 10 0
kernel 20 0
connected 30 0
static 40 1
rip 50 120
ripng 50 120
ospf 60 110
ospf6 49 110
bgp 70 200(iBGP) 20(eBGP)
------------------------------------------
** Distance value can be passed from protocol daemon to zebra.
** "show ip route" shows [metric/distance] value pair.
** Zebra Protocol is changed to support multi-path route and distance
value.
* Changes in ospfd
** "default-information originate [always]" command is added.
** "default-metric <0-16777214>" command is added.
** "show ip ospf database" command is integrated. LS-ID and AdvRouter can
be specifed. The commands are
show ip ospf database TYPE LS-ID
show ip ospf database TYPE LS-ID ADV-ROUTER
show ip ospf database TYPE LS-ID self-originate
show ip ospf database TYPE self-originate
** route-map support for `redistribute' command are added.
Supported `match' statements are
match interface
match ip address
match next-hop
Supported `set' statements are
set metric
set metric-type
** Pass OSPF metric value to zebra daemon.
* Changes in ripd
** When specified route-map does not exist, it means all deny.
** "default-metric <1-16>" command is added.
** "offset-list ACCESS-LIST-NAME <0-16>" and "offset-list
ACCESS-LIST-NAME <0-16> IFNAME" commands are added.
** "redistribute ROUTE-TYPE metric <0-16>" command is added.
** "default-information originate" command is added.
** "ip split-horizon" and "no ip split-horizon" is added to interface
configuration.
** "no router rip" command is added.
** "ip rip authentication mode (md5|text)" is added to interface
configuration.
** "ip rip authentication key-chain KEY-CHAIN" is added to interface
configuration.
** Pass RIP metric value to zebra daemon.
** Distance manipulation functions are added.
* Changes in bgpd
** Fix bug of next hop treatment for MPLS-VPN route exchange.
** BGP peer MIB is updated.
** Aggregated route has origin IGP, atomic-aggregate and proper
aggregator attribute.
** Suppressed route now installed into BGP table. It is only
suppressed from announcement.
** BGP router-id is properly set after "no router bgp ASN" and "router
bgp ASN".
** Add check for nexthop is accessible or not for IBGP routes.
** Add cehck for nexthop is on connected or not for EBGP routes.
** "dump bgp route" command is changed to "dump bgp route-mrt" for
generating MRT compatible dump output.
** Soft reconfiguration inbound and outbound is supported.
** Route refresh feature is supported.
* Changes in vtysh
** VTY shell is now included into the distribution.
* Changes in zebra-0.87
* Changes in lib
** "show startup-config" command is added.
** "show history" command is added.
** Memory statistics command is changed. New command
show memory all
show memory lib
show memory rip
show memory ospf
show memory bgp
are added.
** Filters can be removed only specify it's name. New command
no access-list NAME
no ip community-list NAME
no ip as-path access-list NAME
no route-map NAME
are added.
** At any node, user can view/save user configuration.
write terminal
write file
wirte memory
are added to every node in default.
** LCD completion is added. For example both "ip" and "ipv6" command
are exist, "i" then press TAB will be expanded to "ip".
* Changes in bgpd
** "show ip bgp" family shows total number of prefixes.
** "no bgp default ipv4-unicast" command is added.
** Extended Communities support is added.
** "no neighbor PEER send-community extended" command is added.
** MPLS-VPN PE-RR support is added.
New address family vpnv4 unicast is introduced.
!
address-family vpnv4 unicast
neighobr PEER activate
network A.B.C.D rd RD tag TAG
exit-address-family
!
To make it route-reflector, please configure it under normal router
bgp ASN.
!
router bgp 7675
no bgp default ipv4-unicast
bgp router-id 10.0.0.100
bgp cluster-id 10.0.0.100
neighbor 10.0.0.1 remote-as 65535
neighbor 10.0.0.1 route-reflector-client
neighbor 10.0.0.2 remote-as 65535
neighbor 10.0.0.2 route-reflector-client
neighbor 10.0.0.3 remote-as 65535
neighbor 10.0.0.3 route-reflector-client
!
address-family vpnv4 unicast
neighbor 10.0.0.1 activate
neighbor 10.0.0.2 activate
neighbor 10.0.0.3 activate
exit-address-family
!
* Changes in ospfd
** Many many bugs are fixed.
* Changes in ripd
** Better interface up/down event handle.
* Changes in zebra
** Better interface up/down event handle.
* Changes in zebra-0.86
* Changes in lib
** Fix bug of exec-timeout command which may cause crush.
** Multiple same policy for "access-list", "ip prefix-list, "as-path
access-list", "ip community-list" is not duplicated.
** It used to be "ip prefix-list A.B.C.D/M" match routes which mask >=
M. Now default behavior is exact match so it only match routes which
mask == M.
* Changes in bgpd
** "match ip address prefix-list" is added to route-map.
** A route without local preference is evaluated as 100 local preference.
** Select smaller router-id route when other values are same.
** Compare MED only both routes comes from same neighboring AS.
** "bgp always-compare-med" command is added.
** Now MED value is passed to IBGP peer.
** When neighbor's filter is configured with non-existent access-list,
as-path access-list, ip prefix-list, route-map. The behavior is
changed from all permit to all deny.
* Changes in ospfd
** Fix bug of external route tag byte order.
** OSPF Neighbor deletion bug which cause crush is fixed.
** Some route calculation bug are fixed.
** Add sanity check with router routing table.
** Fix bug of memory leak about linklist.
** Fix bug of 1-WayReceived in NSM.
** Take care of BIGENDIAN architecture.
** Fix bug of NSM state flapping between ExStart and Exchange.
** Fix bug of Network-LSA originated in stub network.
** Fix bug of MS flag unset.
** Add to schedule router_lsa origination when the interface cost
changes.
** Increment LS age by configured interface transmit_delay.
** distribute-list is reimplemented.
** Fix bug of refresh never occurs.
** Fix bug of summary-LSAs reorigination. Correctly copy
OSPF_LSA_APPROVED flag to new LSA. when summary-LSA is reoriginatd.
** Fix bug of re-origination when a neighbor disappears.
** Fix bug of segmentation fault with DD retransmission.
** Fix network-LSA re-origination problem.
** Fix problem of remaining withdrawn routes on zebra.
* Changes in ripd
** Do not leave from multicast group when interface goes down bug is
fixed.
* Changes in zebra
** Remove client structure when client dies.
** Take care static route when interface goes up/down.
* Changes in zebra-0.85
* Changes in bgpd
** "transparent-nexthop" and "transparenet-as" commands are added.
** Route reflector's originator-id bug is fixed.
* Changes in ospfd
** Fix bug of OSPF LSA memory leak.
** Fix bug of OSPF external route memory leak.
** AS-external-LSA origination bug was fixed.
** LS request treatment is completely rewritten. Now performance is
drastically improved.
* Changes in ripd
** RIPv1 update is done by class-full manner.
* Changes in zebra-0.84b
* Changes in lib
** Fix bug of inet_pton return value handling
* Changes in bgpd
** Fix bug of BGP-4+ link-local address nexthop check for IBGP peer.
** Don't allocate whole buffer for displaying "show ip bgp". Now it
consume only one screen size memory.
* Changes in ripd
** Fix debug output string.
** Add RIP peer handling. RIP peer are shown by "show ip protocols".