![]() ![]() ![]() When a recursively resolved BGP route is propagated further in the network, only one nexthop can be selected (as described here) and included in the BGP UPDATE message. BGP itself as protocol does not supports ECMP routes.Gateway-state=recursive distance=20 scope=40 target-scope=10īgp-as-path="65001" bgp-origin=igp received-from=9.9.9.2 ip route set scope=10Įither way, the route to 4.4.4.0/24 should be active now: Or else, modify scope attribute of the static route: routing filter add chain=bgp-in set-target-scope=30 I have reviewed many YouTube videos on how to. To solve this, setup routing filter that sets larger target-scope: I put an IP on the loopback interface and keep in the same subnet as the router but they cannot ping each other. This is because eBGP routes are installed with lesser target-scope by default. If we now print the route table on Router A, we see that the route from Router B is there, but it's not active:Ģ Db dst-address=4.4.4.0/24 gateway=9.9.9.2 interface="" gateway-state=unreachableĭistance=20 scope=40 target-scope=10 bgp-as-path="65001" bgp-origin=igp routing bgp set peer1 remote-address=9.9.9.1 remote-as=65000 update-source=lobridge multihop=yes routing bgp instance set default as=65001 routing bgp set peer1 remote-address=9.9.9.2 remote-as=65001 update-source=lobridge multihop=yes If we are using loopback interfaces, they technically are not, so multihop=yes configuration setting must be specified. By default, eBGP peers are required to be directly reachable. Here the example given above is further developed for eBGP case. The route 4.4.4.0./24 is installed in Linux kernel now with two nexthops: 1.1.1.2 (on ether1) and 2.2.2.2 (on ether2). Gateway-state=reachable,reachable distance=1 scope=30 target-scope=10 Used-hold-time=3m used-keepalive-time=1m refresh-capability=yesįlags: X - disabled, A - active, D - dynamic,Ĭ - connect, S - static, r - rip, b - bgp, o - ospf, m - mme,ī - blackhole, U - unreachable, P - prohibit Updates-received=0 withdrawn-sent=0 withdrawn-received=0 remote-hold-time=3m Local-address=9.9.9.2 uptime=28s prefix-count=0 updates-sent=1 Update-source=lobridge default-originate=no remote-id=1.1.1.1 Ttl=255 in-filter="" out-filter="" address-families=ip Tcp-md5-key="" nexthop-choice=default multihop=no route-reflect=no hold-time=3m routing bgp network add network=4.4.4.0/24Ĭheck that BGP connection is > /routing bgp peer print statusĠ name="peer1" instance=default remote-address=9.9.9.1 remote-as=65000 routing bgp add name=peer1 remote-address=9.9.9.1 remote-as=65000 update-source=lobridge For example, you can configure the loopback IP address as the router ID used to identify the switch in an OSPF area. A loopback IP address can be used by routing protocols. ![]() ip route add dst-address=9.9.9.1/32 gateway=1.1.1.1,2.2.2.1 You can use a loopback interface to establish a Telnet session, ping the switch, and access the switch through SNMP, SSH, and HTTP (WebAgent). ip address add address=9.9.9.2/32 interface=lobridge ip address add address=2.2.2.2/24 interface=ether2 ![]() ip address add address=1.1.1.2/24 interface=ether1 routing bgp add name=peer1 remote-address=9.9.9.2 remote-as=65000 update-source=lobridge routing bgp instance set default as=65000 ip address add address=9.9.9.1/32 interface=lobridge ip address add address=2.2.2.1/24 interface=ether2 Unfortunately this presents a problem as there is vpls between the loopback of all of the devices, and there is corresponding loss over the vpls tunnel.ĭoes anyone have any suggestions on steps to troubleshoot this or have an idea of what it could be? My best guess is it's related to ospf or mpls./ip address add address=1.1.1.1/24 interface=ether1 it shows random packet loss with no obvious pattern to the loopback of the 2004, but not to either of the physical interfaces on the device(one connected to fiber, one connected to wireless). I have smokeping running on a third server in the same location as the 2 CHRs, with a ping probe doing 5 pings 20sec. They all have a bridge (no ports on it) acting as the loopback for ospf. Wireless interface cost is 20, fiber is 10 on all 3 devices. Mpls, vpls, ospf between the 3(full mesh) across 2 different connections, 1 is a wireless connection, the other a fiber connection. Okay, I have 2 CHRs(running vrrp), and a ccr2004. ![]()
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