Linux双网卡绑定状态验证脚本

前景

公司内交换机切换，需提前验证服务器系统主备网卡绑定状态

脚本

需提前配置好YUM源或已安装lldpd服务

#!/bin/bash



# 安装必要工具
install_lldpad() {
    if ! command -v lldptool >/dev/null 2>&1; then
        echo "安装lldpad服务..."
        yum install -y lldpad >/dev/null 2>&1
        echo "启动lldpad服务..."
        systemctl start lldpad >/dev/null 2>&1
    fi
}

# 可靠的低级LLDP解析
parse_lldp_output() {
    local lldp_output="$1"
    local chassis_id=""
    local port_id=""
    local sys_name=""

    # 使用IFS读行进行精确解析
    while IFS= read -r line; do
        # 提取Management Address MAC
        if [[ "$line" =~ "Management Address TLV" ]]; then
            read -r mac_line
            if [[ "$mac_line" =~ MAC:[[:space:]]*([0-9a-f:]{17}) ]]; then
                chassis_id="${BASH_REMATCH[1]}"
            fi
        fi
        
        # 提取Port ID
        if [[ "$line" =~ "Port ID TLV" ]]; then
            read -r port_line
            # 精确匹配Ifname格式
            if [[ "$port_line" =~ Ifname:[[:space:]]*(.+) ]]; then
                port_id="${BASH_REMATCH[1]}"
            fi
        fi
        
        # 提取System Name
        if [[ "$line" =~ "System Name TLV" ]]; then
            read -r sys_line
            sys_name="${sys_line}"
        fi
    done <<< "$lldp_output"
    
    echo "$chassis_id $port_id $sys_name"
}

# 专业的bond处理函数
process_bond() {
    local bond="$1"
    local bond_file="/proc/net/bonding/$bond"
    
    # 确保bond文件存在
    [[ -f "$bond_file" ]] || return

    # 精确解析bond信息
    local mode=$(grep "Bonding Mode" "$bond_file" | awk -F': ' '{print $2}')
    local slaves=$(awk '/Slave Interface:/{slave=$3} /MII Status: up$/{if(slave) print slave}' "$bond_file")
    local up_count=$(echo "$slaves" | wc -l)
    
    # 输出关键信息
    echo "================================================================="
    printf "%-15s: %s\n" "Bond接口" "$bond"
    printf "%-15s: %s\n" "绑定模式" "$mode"
    printf "%-15s: %d\n" "UP网卡数量" "$up_count"
    printf "%-15s: %s\n" "网卡名称" "$(echo $slaves | tr '\n' ' ')"
    echo "================================================================="

    # 处理所有从网卡
    for slave in $slaves; do
        [[ -d "/sys/class/net/$slave" ]] || continue
        
        # 配置并获取LLDP信息
        lldptool set-lldp -i "$slave" adminStatus=rxtx >/dev/null 2>&1
        raw_output=$(lldptool -t -n -i "$slave" 2>&1)
        
        # 精确解析
        read -r chassis_id port_id sys_name <<< "$(parse_lldp_output "$raw_output")"
        
        # 最终检查修正（基于您的实际输出）
        if [[ "$port_id" == "Ifname:" ]]; then
            # 从原始输出重新提取
            port_id=$(grep -A1 "Port ID TLV" <<< "$raw_output" | tail -1 | awk '{print $1}')
        fi

        # 格式化输出
        printf "%-15s: %s\n" "网卡名称" "$slave"
        printf "%-15s: %s\n" "真实MAC地址" "${chassis_id:-未获取到}"
        printf "%-15s: %s\n" "交换机端口" "${port_id:-未获取到}"
        printf "%-15s: %s\n" "交换机名称" "${sys_name:-未获取到}"
        echo "----------------------------------------"
    done
    echo # 分隔空行
}

### 主程序 ###

# 安装必要服务
install_lldpad

# 检测所有bond接口
bonds=$(find /proc/net/bonding/ -maxdepth 1 -type f -printf "%f\n" 2>/dev/null)
[[ -z "$bonds" ]] && exit

# 处理每个bond接口
for bond in $bonds; do
    process_bond "$bond"
done